More on Technology
Gareth Willey
2 years ago
I've had these five apps on my phone for a long time.
TOP APPS
Who survives spring cleaning?
Relax. Notion is off-limits. This topic is popular.
(I wrote about it 2 years ago, before everyone else did.) So).
These apps are probably new to you. I hope you find a new phone app after reading this.
Outdooractive
ViewRanger is Google Maps for outdoor enthusiasts.
This app has been so important to me as a freedom-loving long-distance walker and hiker.
This app shows nearby trails and right-of-ways on top of an Open Street Map.
Helpful detail and data. Any route's distance,
You can download and follow tons of routes planned by app users.
This has helped me find new routes and places a fellow explorer has tried.
Free with non-intrusive ads. Years passed before I subscribed. Pro costs £2.23/month.
This app is for outdoor lovers.
Google Files
New phones come with bloatware. These rushed apps are frustrating.
We must replace these apps. 2017 was Google's year.
Files is a file manager. It's quick, innovative, and clean. They've given people what they want.
It's easy to organize files, clear space, and clear cache.
I recommend Gallery by Google as a gallery app alternative. It's quick and easy.
Trainline
App for trains, buses, and coaches.
I've used this app for years. It did the basics well when I first used it.
Since then, it's improved. It's constantly adding features to make traveling easier and less stressful.
Split-ticketing helps me save hundreds a year on train fares. This app is only available in the UK and Europe.
This service doesn't link to a third-party site. Their app handles everything.
Not all train and coach companies use this app. All the big names are there, though.
Here's more on the app.
Battlefield: Mobile
Play Store has 478,000 games. Few can turn my phone into a console.
Call of Duty Mobile and Asphalt 8/9 are examples.
Asphalt's loot boxes and ads make it unplayable. Call of Duty opens with a few ads. Close them to play without hassle.
This game uses all your phone's features to provide a high-quality, seamless experience. If my internet connection is good, I never experience lag or glitches.
The gameplay is energizing and intense, just like on consoles. Sometimes I'm too involved. I've thrown my phone in anger. I'm totally absorbed.
Customizability is my favorite. Since phones have limited screen space, we should only have the buttons we need, placed conveniently.
Size, opacity, and position are modifiable. Adjust audio, graphics, and textures. It's customizable.
This game has been on my phone for three years. It began well and has gotten better. When I think the creators can't do more, they do.
If you play, read my tips for winning a Battle Royale.
Lightroom
As a photographer, I believe your best camera is on you. The phone.
2017 was a big year for this app. I've tried many photo-editing apps since then. This always wins.
The app is dull. I've never seen better photo editing on a phone.
Adjusting settings and sliders doesn't damage or compress photos. It's detailed.
This is important for phone photos, which are lower quality than professional ones.
Some tools are behind a £4.49/month paywall. Adobe must charge a subscription fee instead of selling licenses. (I'm still bitter about Creative Cloud's price)
Snapseed is my pick. Lightroom is where I do basic editing before moving to Snapseed. Snapseed review:
These apps are great. They cover basic and complex editing needs while traveling.
Final Reflections
I hope you downloaded one of these. Share your favorite apps. These apps are scarce.
Muhammad Rahmatullah
3 years ago
The Pyramid of Coding Principles
A completely operating application requires many processes and technical challenges. Implementing coding standards can make apps right, work, and faster.
With years of experience working in software houses. Many client apps are scarcely maintained.
Why are these programs "barely maintainable"? If we're used to coding concepts, we can probably tell if an app is awful or good from its codebase.
This is how I coded much of my app.
Make It Work
Before adopting any concept, make sure the apps are completely functional. Why have a fully maintained codebase if the app can't be used?
The user doesn't care if the app is created on a super server or uses the greatest coding practices. The user just cares if the program helps them.
After the application is working, we may implement coding principles.
You Aren’t Gonna Need It
As a junior software engineer, I kept unneeded code, components, comments, etc., thinking I'd need them later.
In reality, I never use that code for weeks or months.
First, we must remove useless code from our primary codebase. If you insist on keeping it because "you'll need it later," employ version control.
If we remove code from our codebase, we can quickly roll back or copy-paste the previous code without preserving it permanently.
The larger the codebase, the more maintenance required.
Keep It Simple Stupid
Indeed. Keep things simple.
Why complicate something if we can make it simpler?
Our code improvements should lessen the server load and be manageable by others.
If our code didn't pass those benchmarks, it's too convoluted and needs restructuring. Using an open-source code critic or code smell library, we can quickly rewrite the code.
Simpler codebases and processes utilize fewer server resources.
Don't Repeat Yourself
Have you ever needed an action or process before every action, such as ensuring the user is logged in before accessing user pages?
As you can see from the above code, I try to call is user login? in every controller action, and it should be optimized, because if we need to rename the method or change the logic, etc. We can improve this method's efficiency.
We can write a constructor/middleware/before action that calls is_user_login?
The code is more maintainable and readable after refactoring.
Each programming language or framework handles this issue differently, so be adaptable.
Clean Code
Clean code is a broad notion that you've probably heard of before.
When creating a function, method, module, or variable name, the first rule of clean code is to be precise and simple.
The name should express its value or logic as a whole, and follow code rules because every programming language is distinct.
If you want to learn more about this topic, I recommend reading https://www.amazon.com/Clean-Code-Handbook-Software-Craftsmanship/dp/0132350882.
Standing On The Shoulder of Giants
Use industry standards and mature technologies, not your own(s).
There are several resources that explain how to build boilerplate code with tools, how to code with best practices, etc.
I propose following current conventions, best practices, and standardization since we shouldn't innovate on top of them until it gives us a competitive edge.
Boy Scout Rule
What reduces programmers' productivity?
When we have to maintain or build a project with messy code, our productivity decreases.
Having to cope with sloppy code will slow us down (shame of us).
How to cope? Uncle Bob's book says, "Always leave the campground cleaner than you found it."
When developing new features or maintaining current ones, we must improve our codebase. We can fix minor issues too. Renaming variables, deleting whitespace, standardizing indentation, etc.
Make It Fast
After making our code more maintainable, efficient, and understandable, we can speed up our app.
Whether it's database indexing, architecture, caching, etc.
A smart craftsman understands that refactoring takes time and it's preferable to balance all the principles simultaneously. Don't YAGNI phase 1.
Using these ideas in each iteration/milestone, while giving the bottom items less time/care.
You can check one of my articles for further information. https://medium.com/life-at-mekari/why-does-my-website-run-very-slowly-and-how-do-i-optimize-it-for-free-b21f8a2f0162
Tim Soulo
3 years ago
Here is why 90.63% of Pages Get No Traffic From Google.
The web adds millions or billions of pages per day.
How much Google traffic does this content get?
In 2017, we studied 2 million randomly-published pages to answer this question. Only 5.7% of them ranked in Google's top 10 search results within a year of being published.
94.3 percent of roughly two million pages got no Google traffic.
Two million pages is a small sample compared to the entire web. We did another study.
We analyzed over a billion pages to see how many get organic search traffic and why.
How many pages get search traffic?
90% of pages in our index get no Google traffic, and 5.2% get ten visits or less.
90% of google pages get no organic traffic
How can you join the minority that gets Google organic search traffic?
There are hundreds of SEO problems that can hurt your Google rankings. If we only consider common scenarios, there are only four.
Reason #1: No backlinks
I hate to repeat what most SEO articles say, but it's true:
Backlinks boost Google rankings.
Google's "top 3 ranking factors" include them.
Why don't we divide our studied pages by the number of referring domains?
66.31 percent of pages have no backlinks, and 26.29 percent have three or fewer.
Did you notice the trend already?
Most pages lack search traffic and backlinks.
But are these the same pages?
Let's compare monthly organic search traffic to backlinks from unique websites (referring domains):
More backlinks equals more Google organic traffic.
Referring domains and keyword rankings are correlated.
It's important to note that correlation does not imply causation, and none of these graphs prove backlinks boost Google rankings. Most SEO professionals agree that it's nearly impossible to rank on the first page without backlinks.
You'll need high-quality backlinks to rank in Google and get search traffic.
Is organic traffic possible without links?
Here are the numbers:
Four million pages get organic search traffic without backlinks. Only one in 20 pages without backlinks has traffic, which is 5% of our sample.
Most get 300 or fewer organic visits per month.
What happens if we exclude high-Domain-Rating pages?
The numbers worsen. Less than 4% of our sample (1.4 million pages) receive organic traffic. Only 320,000 get over 300 monthly organic visits, or 0.1% of our sample.
This suggests high-authority pages without backlinks are more likely to get organic traffic than low-authority pages.
Internal links likely pass PageRank to new pages.
Two other reasons:
Our crawler's blocked. Most shady SEOs block backlinks from us. This prevents competitors from seeing (and reporting) PBNs.
They choose low-competition subjects. Low-volume queries are less competitive, requiring fewer backlinks to rank.
If the idea of getting search traffic without building backlinks excites you, learn about Keyword Difficulty and how to find keywords/topics with decent traffic potential and low competition.
Reason #2: The page has no long-term traffic potential.
Some pages with many backlinks get no Google traffic.
Why? I filtered Content Explorer for pages with no organic search traffic and divided them into four buckets by linking domains.
Almost 70k pages have backlinks from over 200 domains, but no search traffic.
By manually reviewing these (and other) pages, I noticed two general trends that explain why they get no traffic:
They overdid "shady link building" and got penalized by Google;
They're not targeting a Google-searched topic.
I won't elaborate on point one because I hope you don't engage in "shady link building"
#2 is self-explanatory:
If nobody searches for what you write, you won't get search traffic.
Consider one of our blog posts' metrics:
No organic traffic despite 337 backlinks from 132 sites.
The page is about "organic traffic research," which nobody searches for.
News articles often have this. They get many links from around the web but little Google traffic.
People can't search for things they don't know about, and most don't care about old events and don't search for them.
Note:
Some news articles rank in the "Top stories" block for relevant, high-volume search queries, generating short-term organic search traffic.
The Guardian's top "Donald Trump" story:
Ahrefs caught on quickly:
"Donald Trump" gets 5.6M monthly searches, so this page got a lot of "Top stories" traffic.
I bet traffic has dropped if you check now.
One of the quickest and most effective SEO wins is:
Find your website's pages with the most referring domains;
Do keyword research to re-optimize them for relevant topics with good search traffic potential.
Bryan Harris shared this "quick SEO win" during a course interview:
He suggested using Ahrefs' Site Explorer's "Best by links" report to find your site's most-linked pages and analyzing their search traffic. This finds pages with lots of links but little organic search traffic.
We see:
The guide has 67 backlinks but no organic traffic.
We could fix this by re-optimizing the page for "SERP"
A similar guide with 26 backlinks gets 3,400 monthly organic visits, so we should easily increase our traffic.
Don't do this with all low-traffic pages with backlinks. Choose your battles wisely; some pages shouldn't be ranked.
Reason #3: Search intent isn't met
Google returns the most relevant search results.
That's why blog posts with recommendations rank highest for "best yoga mat."
Google knows that most searchers aren't buying.
It's also why this yoga mats page doesn't rank, despite having seven times more backlinks than the top 10 pages:
The page ranks for thousands of other keywords and gets tens of thousands of monthly organic visits. Not being the "best yoga mat" isn't a big deal.
If you have pages with lots of backlinks but no organic traffic, re-optimizing them for search intent can be a quick SEO win.
It was originally a boring landing page describing our product's benefits and offering a 7-day trial.
We realized the problem after analyzing search intent.
People wanted a free tool, not a landing page.
In September 2018, we published a free tool at the same URL. Organic traffic and rankings skyrocketed.
Reason #4: Unindexed page
Google can’t rank pages that aren’t indexed.
If you think this is the case, search Google for site:[url]. You should see at least one result; otherwise, it’s not indexed.
A rogue noindex meta tag is usually to blame. This tells search engines not to index a URL.
Rogue canonicals, redirects, and robots.txt blocks prevent indexing.
Check the "Excluded" tab in Google Search Console's "Coverage" report to see excluded pages.
Google doesn't index broken pages, even with backlinks.
Surprisingly common.
In Ahrefs' Site Explorer, the Best by Links report for a popular content marketing blog shows many broken pages.
One dead page has 131 backlinks:
According to the URL, the page defined content marketing. —a keyword with a monthly search volume of 5,900 in the US.
Luckily, another page ranks for this keyword. Not a huge loss.
At least redirect the dead page's backlinks to a working page on the same topic. This may increase long-tail keyword traffic.
This post is a summary. See the original post here
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Katrina Paulson
3 years ago
Dehumanization Against Anthropomorphization
We've fought for humanity's sake. We need equilibrium.
We live in a world of opposites (black/white, up/down, love/hate), thus life is a game of achieving equilibrium. We have a universe of paradoxes within ourselves, not just in physics.
Individually, you balance your intellect and heart, but as a species, we're full of polarities. They might be gentle and compassionate, then ruthless and unsympathetic.
We desire for connection so much that we personify non-human beings and objects while turning to violence and hatred toward others. These contrasts baffle me. Will we find balance?
Anthropomorphization
Assigning human-like features or bonding with objects is common throughout childhood. Cartoons often give non-humans human traits. Adults still anthropomorphize this trait. Researchers agree we start doing it as infants and continue throughout life.
Humans of all ages are good at humanizing stuff. We build emotional attachments to weather events, inanimate objects, animals, plants, and locales. Gods, goddesses, and fictitious figures are anthropomorphized.
Cast Away, starring Tom Hanks, features anthropization. Hanks is left on an island, where he builds an emotional bond with a volleyball he calls Wilson.
We became emotionally invested in Wilson, including myself.
Why do we do it, though?
Our instincts and traits helped us survive and thrive. Our brain is alert to other people's thoughts, feelings, and intentions to assist us to determine who is safe or hazardous. We can think about others and our own mental states, or about thinking. This is the Theory of Mind.
Neurologically, specialists believe the Theory of Mind has to do with our mirror neurons, which exhibit the same activity while executing or witnessing an action.
Mirror neurons may contribute to anthropization, but they're not the only ones. In 2021, Harvard Medical School researchers at MGH and MIT colleagues published a study on the brain's notion of mind.
“Our study provides evidence to support theory of mind by individual neurons. Until now, it wasn’t clear whether or how neurons were able to perform these social cognitive computations.”
Neurons have particular functions, researchers found. Others encode information that differentiates one person's beliefs from another's. Some neurons reflect tale pieces, whereas others aren't directly involved in social reasoning but may multitask contributing factors.
Combining neuronal data gives a precise portrait of another's beliefs and comprehension. The theory of mind describes how we judge and understand each other in our species, and it likely led to anthropomorphism. Neuroscience indicates identical brain regions react to human or non-human behavior, like mirror neurons.
Some academics believe we're wired for connection, which explains why we anthropomorphize. When we're alone, we may anthropomorphize non-humans.
Humanizing non-human entities may make them deserving of moral care, according to another theory. Animamorphizing something makes it responsible for its actions and deserves punishments or rewards. This mental shift is typically apparent in our connections with pets and leads to deanthropomorphization.
Dehumanization
Dehumanizing involves denying someone or anything ethical regard, the opposite of anthropomorphizing.
Dehumanization occurs throughout history. We do it to everything in nature, including ourselves. We experiment on and torture animals. We enslave, hate, and harm other groups of people.
Race, immigrant status, dress choices, sexual orientation, social class, religion, gender, politics, need I go on? Our degrading behavior is promoting fascism and division everywhere.
Dehumanizing someone or anything reduces their agency and value. Many assume they're immune to this feature, but tests disagree.
It's inevitable. Humans are wired to have knee-jerk reactions to differences. We are programmed to dehumanize others, and it's easier than we'd like to admit.
Why do we do it, though?
Dehumanizing others is simpler than humanizing things for several reasons. First, we consider everything unusual as harmful, which has helped our species survive for hundreds of millions of years. Our propensity to be distrustful of others, like our fear of the unknown, promotes an us-vs.-them mentality.
Since WWII, various studies have been done to explain how or why the holocaust happened. How did so many individuals become radicalized to commit such awful actions and feel morally justified? Researchers quickly showed how easily the mind can turn gloomy.
Stanley Milgram's 1960s electroshock experiment highlighted how quickly people bow to authority to injure others. Philip Zimbardo's 1971 Stanford Prison Experiment revealed how power may be abused.
The us-versus-them attitude is natural and even young toddlers act on it. Without a relationship, empathy is more difficult.
It's terrifying how quickly dehumanizing behavior becomes commonplace. The current pandemic is an example. Most countries no longer count deaths. Long Covid is a major issue, with predictions of a handicapped tsunami in the future years. Mostly, we shrug.
In 2020, we panicked. Remember everyone's caution? Now Long Covid is ruining more lives, threatening to disable an insane amount of our population for months or their entire lives.
There's little research. Experts can't even classify or cure it. The people should be outraged, but most have ceased caring. They're over covid.
We're encouraged to find a method to live with a terrible pandemic that will cause years of damage. People aren't worried about infection anymore. They shrug and say, "We'll all get it eventually," then hope they're not one of the 30% who develops Long Covid.
We can correct course before further damage. Because we can recognize our urges and biases, we're not captives to them. We can think critically about our thoughts and behaviors, then attempt to improve. We can recognize our deficiencies and work to attain balance.
Changing perspectives
We're currently attempting to find equilibrium between opposites. It's superficial to defend extremes by stating we're only human or wired this way because both imply we have no control.
Being human involves having self-awareness, and by being careful of our thoughts and acts, we can find balance and recognize opposites' purpose.
Extreme anthropomorphizing and dehumanizing isolate and imperil us. We anthropomorphize because we desire connection and dehumanize because we're terrified, frequently of the connection we crave. Will we find balance?
Katrina Paulson ponders humanity, unanswered questions, and discoveries. Please check out her newsletters, Curious Adventure and Curious Life.
Sea Launch
3 years ago
📖 Guide to NFT terms: an NFT glossary.
NFT lingo can be overwhelming. As the NFT market matures and expands so does its own jargon, slang, colloquialisms or acronyms.
This ever-growing NFT glossary goal is to unpack key NFT terms to help you better understand the NFT market or at least not feel like a total n00b in a conversation about NFTs on Reddit, Discord or Twitter.
#
1:1 Art
Art where each piece is one of a kind (1 of 1). Unlike 10K projects, PFP or Generative Art collections have a cap of NFTs released that can range from a few hundreds to 10K.
1/1 of X
Contrary to 1:1 Art, 1/1 of X means each NFT is unique, but part of a large and cohesive collection. E.g: Fidenzas by Tyler Hobbs or Crypto Punks (each Punk is 1/1 of 10,000).
10K Project
A type of NFT collection that consists of approximately 10,000 NFTs (but not strictly).
A
AB
ArtBlocks, the most important platform for generative art currently.
AFAIK
As Far As I Know.
Airdrop
Distribution of an NFT token directly into a crypto wallet for free. Can be used as a marketing campaign or as scam by airdropping fake tokens to empty someone’s wallet.
Alpha
The first or very primitive release of a project. Or Investment term to track how a certain investment outdoes the market. E.g: Alpha of 1.0 = 1% improvement or Alpha of 20.0 = 20% improvement.
Altcoin
Any other crypto that is not Bitcoin. Bitcoin Maximalists can also refer to them as shitcoins.
AMA
Ask Me Anything. NFT creators or artists do sessions where anyone can ask questions about the NFT project, team, vision, etc. Usually hosted on Discord, but also on Reddit or even Youtube.
Ape
Someone can be aping, ape in or aped on an NFT meaning someone is taking a large position relative to its own portfolio size. Some argue that when someone apes can mean that they're following the hype, out of FOMO or without due diligence. Not related directly to the Bored Ape Yatch Club.
ATH
All-Time High. When a NFT project or token reaches the highest price to date.
Avatar project
An NFT collection that consists of avatars that people can use as their profile picture (see PFP) in social media to show they are part of an NFT community like Crypto Punks.
Axie Infinity
ETH blockchain-based game where players battle and trade Axies (digital pets). The main ERC-20 tokens used are Axie Infinity Shards (AXS) and Smooth Love Potions (formerly Small Love Potion) (SLP).
Axie Infinity Shards
AXS is an Eth token that powers the Axie Infinity game.
B
Bag Holder
Someone who holds its position in a crypto or keeps an NFT until it's worthless.
BAYC
Bored Ape Yacht Club. A very successful PFP 1/1 of 10,000 individual ape characters collection. People use BAYC as a Twitter profile picture to brag about being part of this NFT community.
Bearish
Borrowed finance slang meaning someone is doubtful about the current market and that it will crash.
Bear Market
When the Crypto or NFT market is going down in value.
Bitcoin (BTC)
First and original cryptocurrency as outlined in a whitepaper by the anonymous creator(s) Satoshi Nakamoto.
Bitcoin Maximalist
Believer that Bitcoin is the only cryptocurrency needed. All other cryptocurrencies are altcoins or shitcoins.
Blockchain
Distributed, decentralized, immutable database that is the basis of trust in Web 3.0 technology.
Bluechip
When an NFT project has a long track record of success and its value is sustained over time, therefore considered a solid investment.
BTD
Buy The Dip. A bear market can be an opportunity for crypto investors to buy a crypto or NFT at a lower price.
Bullish
Borrowed finance slang meaning someone is optimistic that a market will increase in value aka moon.
Bull market
When the Crypto or NFT market is going up and up in value.
Burn
Common crypto strategy to destroy or delete tokens from the circulation supply intentionally and permanently in order to limit supply and increase the value.
Buying on secondary
Whenever you don’t mint an NFT directly from the project, you can always buy it in secondary NFT marketplaces like OpenSea. Most NFT sales are secondary market sales.
C
Cappin or Capping
Slang for lying or faking. Opposed to no cap which means “no lie”.
Coinbase
Nasdaq listed US cryptocurrency exchange. Coinbase Wallet is one of Coinbase’s products where users can use a Chrome extension or app hot wallet to store crypto and NFTs.
Cold wallet
Otherwise called hardware wallet or cold storage. It’s a physical device to store your cryptocurrencies and/or NFTs offline. They are not connected to the Internet so are at less risk of being compromised.
Collection
A set of NFTs under a common theme as part of a NFT drop or an auction sale in marketplaces like OpenSea or Rarible.
Collectible
A collectible is an NFT that is a part of a wider NFT collection, usually part of a 10k project, PFP project or NFT Game.
Collector
Someone who buys NFTs to build an NFT collection, be part of a NFT community or for speculative purposes to make a profit.
Cope
The opposite of FOMO. When someone doesn’t buy an NFT because one is still dealing with a previous mistake of not FOMOing at a fraction of the price. So choosing to stay out.
Consensus mechanism
Method of authenticating and validating a transaction on a blockchain without the need to trust or rely on a central authority. Examples of consensus mechanisms are Proof of Work (PoW) or Proof of Stake (PoS).
Cozomo de’ Medici
Twitter alias used by Snoop Dogg for crypto and NFT chat.
Creator
An NFT creator is a person that creates the asset for the NFT idea, vision and in many cases the art (e.g. a jpeg, audio file, video file).
Crowsale
Where a crowdsale is the sale of a token that will be used in the business, an Initial Coin Offering (ICO) is the sale of a token that’s linked to the value of the business. Buying an ICO token is akin to buying stock in the company because it entitles you a share of the earnings and profits. Also, some tokens give you voting rights similar to holding stock in the business. The US Securities and Exchange Commission recently ruled that ICOs, but not crowdselling, will be treated as the sale of a security. This basically means that all ICOs must be registered like IPOs and offered only to accredited investors. This dramatically increases the costs and limits the pool of potential buyers.
Crypto Bags/Bags
Refers to how much cryptocurrencies someone holds, as in their bag of coins.
Cryptocurrency
The native coin of a blockchain (or protocol coin), secured by cryptography to be exchanged within a Peer 2 Peer economic system. E.g: Bitcoin (BTC) for the Bitcoin blockchain, Ether (ETH) for the Ethereum blockchain, etc.
Crypto community
The community of a specific crypto or NFT project. NFT communities use Twitter and Discord as their primary social media to hang out.
Crypto exchange
Where someone can buy, sell or trade cryptocurrencies and tokens.
Cryptography
The foundation of blockchain technology. The use of mathematical theory and computer science to encrypt or decrypt information.
CryptoKitties
One of the first and most popular NFT based blockchain games. In 2017, the NFT project almost broke the Ethereum blockchain and increased the gas prices dramatically.
CryptoPunk
Currently one of the most valuable blue chip NFT projects. It was created by Larva Labs. Crypto Punk holders flex their NFT as their profile picture on Twitter.
CT
Crypto Twitter, the crypto-community on Twitter.
Cypherpunks
Movement in the 1980s, advocating for the use of strong cryptography and privacy-enhancing technologies as a route to social and political change. The movement contributed and shaped blockchain tech as we know today.
D
DAO
Stands for Decentralized Autonomous Organization. When a NFT project is structured like a DAO, it grants all the NFT holders voting rights, control over future actions and the NFT’s project direction and vision. Many NFT projects are also organized as DAO to be a community-driven project.
Dapp
Mobile or web based decentralized application that interacts on a blockchain via smart contracts. E.g: Dapp is the frontend and the smart contract is the backend.
DCA
Acronym for Dollar Cost Averaging. An investment strategy to reduce the impact of crypto market volatility. E.g: buying into a crypto asset on a regular monthly basis rather than a big one time purchase.
Ded
Abbreviation for dead like "I sold my Punk for 90 ETH. I am ded."
DeFi
Short for Decentralized Finance. Blockchain alternative for traditional finance, where intermediaries like banks or brokerages are replaced by smart contracts to offer financial services like trading, lending, earning interest, insure, etc.
Degen
Short for degenerate, a gambler who buys into unaudited or unknown NFT or DeFi projects, without proper research hoping to chase high profits.
Delist
No longer offer an NFT for sale on a secondary market like Opensea. NFT Marketplaces can delist an NFT that infringes their rules. Or NFT owners can choose to delist their NFTs (has long as they have sufficient funds for the gas fees) due to price surges to avoid their NFT being bought or sold for a higher price.
Derivative
Projects derived from the original project that reinforces the value and importance of the original NFT. E.g: "alternative" punks.
Dev
A skilled professional who can build NFT projects using smart contracts and blockchain technology.
Dex
Decentralised Exchange that allows for peer-to-peer trustless transactions that don’t rely on a centralized authority to take place. E.g: Uniswap, PancakeSwap, dYdX, Curve Finance, SushiSwap, 1inch, etc.
Diamond Hands
Someone who believes and holds a cryptocurrency or NFT regardless of the crypto or NFT market fluctuations.
Discord
Chat app heavily used by crypto and NFT communities for knowledge sharing and shilling.
DLT
Acronym for Distributed Ledger Technology. It’s a protocol that allows the secure functioning of a decentralized database, through cryptography. This technological infrastructure scraps the need for a central authority to keep in check manipulation or exploitation of the network.
Dog coin
It’s a memecoin based on the Japanese dog breed, Shiba Inu, first popularised by Dogecoin. Other notable coins are Shiba Inu or Floki Inu. These dog coins are frequently subjected to pump and dumps and are extremely volatile. The original dog coin DOGE was created as a joke in 2013. Elon Musk is one of Dogecoin's most famous supporters.
Doxxed/Doxed
When the identity of an NFT team member, dev or creator is public, known or verifiable. In the NFT market, when a NFT team is doxed it’s a usually sign of confidence and transparency for NFT collectors to ensure they will not be scammed for an anonymous creator.
Drop
The release of an NFT (single or collection) into the NFT market.
DYOR
Acronym for Do Your Own Research. A common expression used in the crypto or NFT community to disclaim responsibility for the financial/strategy advice someone is providing the community and to avoid being called out by others in theNFT or crypto community.
E
EIP-1559 EIP
Referring to Ethereum Improvement Proposal 1559, commonly known as the London Fork. It’s an upgrade to the Ethereum protocol code to improve the blockchain security and scalability. The major change consists in shifting from a proof-of-work consensus mechanism (PoW) to a low energy and lower gas fees proof-of-stake system (PoS).
ERC-1155
Stands for Ethereum Request for Comment-1155. A multi-token standard that can represent any number of fungible (ERC-20) and non-fungible tokens (ERC-721).
ERC-20
Ethereum Request for Comment-20 is a standard defining a fungible token like a cryptocurrency.
ERC-721
Ethereum Request for Comment-721 is a standard defining a non-fungible token (NFT).
ETH
Aka Ether, the currency symbol for the native cryptocurrency of the Ethereum blockchain.
ETH2.0
Also known as the London Fork or EIP-1559 EIP. It’s an upgrade to the Ethereum network to improve the network’s security and scalability. The most dramatic change is the shift from the proof-of-work consensus mechanism (PoW) to proof-of-stake system (PoS).
Ether
Or ETH, the native cryptocurrency of the Ethereum blockchain.
Ethereum
Network protocol that allows users to create and run smart contracts over a decentralized network.
F
FCFS
Acronym for First Come First Served. Commonly used strategy in a NFT collection drop when the demand surpasses the supply.
Few
Short for "few understand". Similar to the irony behind the "probably nothing" expression. Like X person bought into a popular NFT, because it understands its long term value.
Fiat Currencies or Money
National government-issued currencies like the US Dollar (USD), Euro (EUR) or Great British Pound (GBP) that are not backed by a commodity like silver or gold. FIAT means an authoritative or arbitrary order like a government decree.
Flex
Slang for showing off. In the crypto community, it’s a Lamborghini or a gold Rolex. In the NFT world, it’s a CryptoPunk or BAYC PFP on Twitter.
Flip
Quickly buying and selling crypto or NFTs to make a profit.
Flippening
Colloquial expression coined in 2017 for when Ethereum’s market capitalisation surpasses Bitcoin’s.
Floor Price
It means the lowest asking price for an NFT collection or subset of a collection on a secondary market like OpenSea.
Floor Sweep
Refers when a NFT collector or investor buys all the lowest listed NFTs on a secondary NFT marketplace.
FOMO
Acronym for Fear Of Missing Out. Buying a crypto or NFT out of fear of missing out on the next big thing.
FOMO-in
Buying a crypto or NFT regardless if it's at the top of the market for FOMO.
Fractionalize
Turning one NFT like a Crypto Punk into X number of fractions ERC-20 tokens that prove ownership of that Punk. This allows for i) collective ownership of an NFT, ii) making an expensive NFT affordable for the common NFT collector and iii) adds more liquidity to a very illiquid NFT market.
FR
Abbreviation for For Real?
Fren
Means Friend and what people in the NFT community call each other in an endearing and positive way.
Foundation
An exclusive, by invitation only, NFT marketplace that specializes in NFT art.
Fungible
Means X can be traded for another X and still hold the same value. E.g: My dollars = your dollars. My 1 ether = your 1 ether. My casino chip = your casino chip. On Ethereum, fungible tokens are defined by the ERC-20 standard.
FUD
Acronym for Fear Uncertainty Doubt. It can be a) when someone spreads negative and sometimes false news to discredit a certain crypto or NFT project. Or b) the overall negative feeling regarding the future of the NFT/Crypto project or market, especially when going through a bear market.
Fudder
Someone who has FUD or engages in FUD about a NFT project.
Fudding your own bags
When an NFT collector or crypto investor speaks negatively about an NFT or crypto project he/she has invested in or has a stake in. Usually negative comments about the team or vision.
G
G
Means Gangster. A term of endearment used amongst the NFT Community.
Gas/Gas fees/Gas prices
The fee charged to complete a transaction in a blockchain. These gas prices vary tremendously between the blockchains, the consensus mechanism used to validate transactions or the number of transactions being made at a specific time.
Gas war
When a lot of NFT collectors (or bots) are trying to mint an NFT at once and therefore resulting in gas price surge.
Generative art
Artwork that is algorithmically created by code with unique traits and rarity.
Genesis drop
It refers to the first NFT drop a creator makes on an NFT auction platform.
GG
Interjection for Good Game.
GM
Interjection for Good Morning.
GMI
Acronym for Going to Make It. Opposite of NGMI (NOT Going to Make It).
GOAT
Acronym for Greatest Of All Time.
GTD
Acronym for Going To Dust. When a token or NFT project turns out to be a bad investment.
GTFO
Get The F*ck Out, as in “gtfo with that fud dude” if someone is talking bull.
GWEI
One billionth of an Ether (ETH) also known as a Shannon / Nanoether / Nano — unit of account used to price Ethereum gas transactions.
H
HEN (Hic Et Nunc)
A popular NFT art marketplace for art built on the Tezos blockchain. Big NFT marketplace for inexpensive NFTs but not a very user-friendly UI/website.
HODL
Misspelling of HOLD coined in an old Reddit post. Synonym with “Hold On for Dear Life” meaning hold your coin or NFT until the end, whether that they’ll moon or dust.
Hot wallet
Wallets connected to the Internet, less secure than cold wallet because they’re more susceptible to hacks.
Hype
Term used to show excitement or anticipation about an upcoming crypto project or NFT.
I
ICO
Acronym for Initial Coin Offering. It’s the crypto equivalent to a stocks’ IPO (Initial Public Offering) but with far less scrutiny or regulation (leading to a lot of scams). ICO’s are a popular way for crypto projects to raise funds.
IDO
Acronym for Initial Dex Offering. To put it simply it means to launch NFTs or tokens via a decentralized liquidity exchange. It’s a common fundraising method used by upcoming crypto or NFT projects. Many consider IDOs a far better fundraising alternative to ICOs.
IDK
Acronym for I Don’t Know.
IDEK
Acronym for I Don’t Even Know.
Imma
Short for I’m going to be.
IRL
Acronym for In Real Life. Refers to the physical world outside of the online/virtual world of crypto, NFTs, gaming or social media.
IPFS
Acronym for Interplanetary File System. A peer-to-peer file storage system using hashes to recall and preserve the integrity of the file, commonly used to store NFTs outside of the blockchain.
It’s Money Laundering
Someone can use this expression to suggest that NFT prices aren’t real and that actually people are using NFTs to launder money, without providing much proof or explanation on how it works.
IYKYK
Stands for If You Know, You Know This. Similar to the expression "few", used when someone buys into a popular crypto or NFT project, slightly because of FOMO but also because it believes in its long term value.
J
JPEG/JPG
File format typically used to encode NFT art. Some people also use Jpeg to mock people buying NFTs as in “All that money for a jpeg”.
K
KMS
Short for Kill MySelf.
L
Larva Labs/ LL
NFT Creators behind the popular NFT projects like Cryptopunks,Meebits or Autoglyphs.
Laser eyes
Bitcoin meme signalling support for BTC and/or it will break the $100k per coin valuation.
LFG
Acronym for Let’s F*cking Go! A common rallying call used in the crypto or NFT community to lead people into buying an NFT or a crypto.
Liquidity
Term that means that a token or NFT has a high volume activity in the crypto/NFT market. It’s easily sold and resold. But usually the NFT market it’s illiquid when compared to the general crypto market, due to the non-fungibility nature of an NFT (there are less buyers for every NFTs out there).
LMFAO
Stands for Laughing My F*cking Ass Off.
Looks Rare
Ironic expression commonly used in the NFT Community. Rarity is a driver of an NFT’s value.
London Hard Fork
Known as EIP-1559, was an Ethereum code upgrade proposal designed to improve the blockchain security and scalability. It’s major change is to shift from PoW to PoS consensus mechanism.
Long run
Means someone is committed to the NFT market or an NFT project in the long term.
M
Maximalist
Typically refers to Bitcoin Maximalists. People who only believe that Bitcoin is the most secure and resilient blockchain. For Maximalists, all other cryptocurrencies are shitcoins therefore a waste of time, development and money.
McDonald's
Common and ironic expression amongst the crypto community. It means that Mcdonald’s is always a valid backup plan or career in the case all cryptocurrencies crash and disappear.
Meatspace
Synonymous with IRL - In Real Life.
Memecoin
Cryptocurrency like Dogecoin that is based on an internet joke or meme.
Metamask
Popular crypto hot wallet platform to store crypto and NFTs.
Metaverse
Term was coined by writer Neal Stephenson in the 1992 dystopian novel “Snow Crash”. It’s an immersive and digital place where people interact via their avatars. Big tech players like Meta (formerly known as Facebook) and other independent players have been designing their own version of a metaverse. NFTs can have utility for users like buying, trading, winning, accessing, experiencing or interacting with things inside a metaverse.
Mfer
Short for “mother fker”.
Miners
Single person or company that mines one or more cryptocurrencies like Bitcoin or Ethereum. Both blockchains need computing power for their Proof of Work consensus mechanism. Miners provide the computing power and receive coins/tokens in return as payment.
Mining
Mining is the process by which new tokens enter in circulation as for example in the Bitcoin blockchain. Also, mining ensures the validity of new transactions happening in a given blockchain that uses the PoW consensus mechanism. Therefore, the ones who mine are rewarded by ensuring the validity of a blockchain.
Mint/Minting
Mint an NFT is the act of publishing your unique instance to a specific blockchain like Ethereum or Tezos blockchain. In simpler terms, a creator is adding a one-of-kind token (NFT) into circulation in a specific blockchain.
Once the NFT is minted - aka created - NFT collectors can i) direct mint, therefore purchase the NFT by paying the specified amount directly into the project’s wallet. Or ii) buy it via an intermediary like an NFT marketplace (e.g: OpenSea, Foundation, Rarible, etc.). Later, the NFT owner can choose to resell the NFT, most NFT creators set up a royalty for every time their NFT is resold.
Minting interval
How often an NFT creator can mint or create tokens.
MOAR
A misspelling that means “more”.
Moon/Mooning
When a coin (e.g. ETH), or token, like an NFT goes exponential in price and the price graph sees a vertical climb. Crypto or NFT users then use the expression that “X token is going to the moon!”.
Moon boys
Slang for crypto or NFT holders who are looking to pump the price dramatically - taking a token to the moon - for short term gains and with no real long term vision or commitment.
N
Never trust, always verify
Treat everyone or every project like something potentially malicious.
New coiner
Crypto slang for someone new to the cryptocurrency space. Usually newcomers can be more susceptible to FUD or scammers.
NFA
Acronym for Not Financial Advice.
NFT
Acronym for Non-Fungible Token. The type of token that can be created, bought, sold, resold and viewed in different dapps. The ERC-721 smart contract standard (Ethereum blockchain) is the most popular amongst NFTs.
NFT Marketplace / NFT Auction platform
Platforms where people can sell and buy NFTs, either via an auction or pay the seller’s price. The largest NFT marketplace is OpenSea. But there are other popular NFT marketplace examples like Foundation, SuperRare, Nifty Gateway, Rarible, Hic et Nunc (HeN), etc.
NFT Whale
A NFT collector or investor who buys a large amount of NFTs.
NGMI
Acronym for Not Going to Make It. For example, something said to someone who has paper hands.
NMP
Acronym for Not My Problem.
Nocoiner
It can be someone who simply doesn’t hold cryptocurrencies, mistrust the crypto market or believes that crypto is either a scam or a ponzi scheme.
Noob/N00b/Newbie
Slang for someone new or not experienced in cryptocurrency or NFTs. These people are more susceptible to scams, drawn into pump and dumps or getting rekt on bad coins.
Normie/Normy
Similar expression for a nocoiner.
NSFW
Acronym for Not Suitable For Work. Referring to online content inappropriate for viewing in public or at work. It began as mostly a tag for sexual content, nudity, or violence, but it has envolved to range a number of other topics that might be delicate or trigger viewers.
Nuclear NFTs
An NFT or collectible with more than 1,000 owners. For the NFT to be sold or resold, every co-owners must give their permission beforehand. Otherwise, the NFT transaction can’t be made.
O
OG
Acronym for Original Gangster and it popularized by 90s Hip Hop culture. It means the first, the original or the person who has been around since the very start and earned respect in the community. In NFT terms, Cryptopunks are the OG of NFTs.
On-chain vs Off-chain
An on-chain NFT is when the artwork (like a jpeg, video or music file) is stored directly into the blockchain making it more secure and less susceptible to being stolen. But, note that most blockchains can only store small amounts of data.
Off-chain NFTs means that the high quality image, music or video file is not stored in the blockchain. But, the NFT data is stored on an external party like a) a centralized server, highly vulnerable to the server being shut down/exploited. Or b) an InterPlanetary File System (IPFS), also an external party but more secure way of finding data because it utilizes a distributed, decentralized system.
OpenSea
By far the largest NFT marketplace in the world, currently.
P
Paper Hands
A crypto or NFT holder who is permeable to negative market sentiment or FUD. And does not hold their crypto or NFT for long. Expression used to describe someone who sells as soon as NFTs enter a bear market.
PFP
Stands for Picture For Profile. Twitter users who hold popular NFTs like Crypto Punk or BAYC use their punk or monkey avatar as their profile picture.
POAP NFT
Stands for Proof of Attendance Protocol. These types of NFTs are awarded to attendees of events, regardless if they’re physical or virtual, as proof you attended.
PoS
Stands for Proof of Stake. A consensus mechanism used by blockchains like Bitcoin or Ethereum to achieve agreement, trust and security in every transaction and keep the integrity of the blockchain intact. PoS mechanisms are considered more environmentally friendly than PoW as they’re lower energy and in emissions.
PoW
Stands for Proof of Work. A consensus mechanism used by blockchains like Bitcoin to achieve agreement, trust and security and keep the transactional integrity of the blockchain intact. PoW mechanism requires a lot of computational power, therefore uses more energy resources and higher CO2 emissions than the PoS mechanism.
Private Key
It can be similar to a password. It’s a secret number that allows users to access their cold or hot wallet funds, prove ownership of a certain address and sign transactions on the blockchain.
It’s not advisable to share a private key with anyone as it makes a person vulnerable to thefts. In case someone loses or forgets its private key, it can use a recovery phrase to restore access to a crypto or NFT wallet.
Pre-mine
A term used in crypto to refer to the act of creating a set amount of tokens before their public launch. It can also be known as a Genesis Sale and is usually associated with Initial Coin Offerings (ICOs) in order to compensate founders, developers or early investors.
Probably nothing
It’s an ironic expression used by NFT enthusiasts to refer to an important or soon to be big news, project or person in the NFT space. Meaning when someone says probably nothing it actually means that it is probably something.
Protocol Coin
Stands for the native coin of a blockchain. As in Ether for the Ethereum blockchain or BTC on the Bitcoin blockchain.
Pump & Dump
The term pump means when a person or a group of people buy or convince others to buy large quantities of a crypto or an NFT with the single goal to drive the price to a peak. When the price peaks, these people sell their position high and for a hefty profit, therefore dumping the price and leaving other slower investors or newbies rekt or at a loss.
R
Rarity
Rarity in NFT terms refers to how rare an NFT is. The rarity can be defined by the number of traits, scarcity or properties of an NFT.
Reaching
Slang for an exaggeration over something to make it sound worse than what it actually is or to take a point/scenario too far.
Recovery phrase
A 12-word phrase that acts like backup for your crypto private keys. A person can recover all of the crypto wallet accounts’ private keys from the recovery phrase. Is not advisable to share the recovery phrase with anyone.
Rekt
Slang for wrecked. When a crypto or NFT project goes wrong or down in value sharply. Or more broadly, when something goes wrong like a person is price out by the gas surge or an NFT floor price goes down.
Right Click Save As
An Ironic expression used by people who don’t understand the value or potential unlocked by NFTs. Person who makes fun that she/he can easily get a digital artwork by Right Click Save As and mock the NFT space and its hype.
Roadmap
The strategy outlined by an NFT project. A way to explain to the NFT community or a potential NFT investor, the different stages, value and the long term vision of the NFT project.
Royalties
NFT creators can set up their NFT so each time their NFT is resold, the creator gets paid a percentage of the sale price.
RN
Acronym for Right Now.
Rug Pull/Rugged
Slang for a scam when the founders, team or developers suddenly leave a crypto project and run away with all the investors’ funds leaving them with nothing.
S
Satoshi Nakamoto
The anonymous creator of the Bitcoin whitepaper and whose identity has never been verified.
Scammer
Someone actively trying to steal other people’s crypto or NFTs.
Secondary
Secondary refers to secondary NFT marketplaces, where NFT collectors or investors can resell NFTs after they’ve been minted. The price of an NFT or NFT collection is determined by those who list them.
Seed phrase
Another name for recovery phrase is the 12-word phrase that allows you to recover all of the crypto wallet accounts’ private keys and regain control of the wallet. Is not advisable to share the seed phrase with anyone.
Seems legit
When an NFT project or a person in the NFT community looks promising and the real deal, meaning seems legitimate. Depending on the context can also be used ironically.
Seems rare
An ironic expression or dismissive comment used by the NFT community. For example, It can be used sarcastically when someone asks for feedback on an NFT they own or created.
Ser
Slang for sir and a polite way of addressing others in an NFT community.
Shill
Expression when someone wants to promote or get exposure to an NFT they own or created.
Shill Thread
It’s a common Twitter strategy to gain traction by encouraging NFT creators to share a link to their NFT project in the hopes of getting bought or noticed by the NFT Community and potential buyers.
Simp/Simping
A NFT holder or creator who comes off as trying to hard impress an NFT whale or investor.
Sh*tposter
A person who mostly posts meme content on Twitter for fun.
SLP
Acronym for Smooth Love Potion. It’s a token players can earn as a reward in the NFT game Axie Infinity.
Smart Contract
A self-executing contract where the terms of the agreement between buyer and seller are directly written into the code and without third party or human intervention. Ethereum is a blockchain that can execute smart contracts, on the contrary to Bitcoin which does not have that capability.
SMFH
Acronym for Shaking My F*cking Head. Common reply to a person showing unbelievable idiocy.
Sock Puppet
Scam account used to lure noob investors into fake investment services.
Snag
It means to buy an NFT quickly and for a very low price. Can also be known as sniping.
Sotheby’s
Very famous auction house that has recently auctioned Beeple’s NFTs or Bored Ape Yacht Club and Crypto Punks’ NFT collections.
Stake
Crypto term for locking up a certain amount of crypto tokens for a set period of time to earn interest. In the NFT space, there are popping up a lot of projects or services that allow NFT holders to earn interest for holding a certain NFT.
Szn
Stands for season referring to crypto or NFT market cycles.
T
TINA
Acronym for There Is No Alternative. Example: someone asks “why are you investing in BTC?”, to which the reply is “TINA”.
TINA RIF
Acronym for There Is No Alternative Resistance Is Futile.
This is the way
A commendation for positive behavior by someone in the NFT Community.
Tokenomics
Referring to the economics of cryptocurrencies, DeFi or NFT projects.
V
Valhalla
Ironic use of the Viking “heaven”. Meaning someone’s NFT collection is either going to be a profitable and blue chip project, therefore they can ascend to Valhalla or is going to tank and that person will have to work at a Mcdonald’s.
Vibe
Term used to express a positive emotional state.
Volatile/Volatility
Term used to describe rapid market fluctuations and crypto or NFT prices go up and down quickly in a short period.
W
WAGMI
Acronym for We Are Going to Make It. Rally cry to build momentum for a crypto or NFT project and lead even more people into buying, shilling or supporting a specific project.
Wallet
There can be a hot or cold wallet, but both are a place where someone can store their cryptocurrency and tokens. Hot wallets are always connected to the Internet like MetaMask, Trust wallet or Phantom. On the contrary cold wallets are hardware wallets to store crypto or NFTs offline like Nano Ledger.
Weak Hands
Synonymous with Paper Hands. Someone who immediately sells their crypto or NFT because of a bear market, FUD or any other negative sentiment.
Web 1.0
Refers to the beginning of the Web. A period from around 1990 to 2005, also known as the read-only web.
Web 2.0
Refers to an iteration of Web 1.0. From 2005 to the present moment, where social media platforms like Facebook, Instagram, TikTok, Google, Twitter, etc reshaped the web, therefore becoming the read-write web.
Web 3.0
A term coined by Ethereum co-founder Gavin Wood and it’s an idea of what the future of the web could look like. Most peoples’ data, info or content would no longer be centralized in Web 2.0 giants - the Big Tech - but decentralized, mostly thanks to blockchain technology. Web 3.0 could be known as read-write-trust web.
Wen
As in When.
Wen Moon
Popular expression from crypto Twitter not so much in the NFT space. Refers to the still distant future when a token will moon.
Whitepaper
Document released by a crypto or NFT project where it lays the technical information behind the concept, vision, roadmap and plans to grow a certain project.
Whale
Someone who owns a large position on a specific or many cryptos or NFTs.
Y
Yodo
Acronym for You Only Die Once. The opposite of Yolo.
Yolo
Acronym for You Only Live Once. A person can use this when they just realized they bought a shitcoin or crap NFT and they’re getting rekt.
Original post
Ajay Shrestha
2 years ago
Bitcoin's technical innovation: addressing the issue of the Byzantine generals
The 2008 Bitcoin white paper solves the classic computer science consensus problem.
Issue Statement
The Byzantine Generals Problem (BGP) is called after an allegory in which several generals must collaborate and attack a city at the same time to win (figure 1-left). Any general who retreats at the last minute loses the fight (figure 1-right). Thus, precise messengers and no rogue generals are essential. This is difficult without a trusted central authority.
In their 1982 publication, Leslie Lamport, Robert Shostak, and Marshall Please termed this topic the Byzantine Generals Problem to simplify distributed computer systems.
Consensus in a distributed computer network is the issue. Reaching a consensus on which systems work (and stay in the network) and which don't makes maintaining a network tough (i.e., needs to be removed from network). Challenges include unreliable communication routes between systems and mis-reporting systems.
Solving BGP can let us construct machine learning solutions without single points of failure or trusted central entities. One server hosts model parameters while numerous workers train the model. This study describes fault-tolerant Distributed Byzantine Machine Learning.
Bitcoin invented a mechanism for a distributed network of nodes to agree on which transactions should go into the distributed ledger (blockchain) without a trusted central body. It solved BGP implementation. Satoshi Nakamoto, the pseudonymous bitcoin creator, solved the challenge by cleverly combining cryptography and consensus mechanisms.
Disclaimer
This is not financial advice. It discusses a unique computer science solution.
Bitcoin
Bitcoin's white paper begins:
“A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without going through a financial institution.” Source: https://www.ussc.gov/sites/default/files/pdf/training/annual-national-training-seminar/2018/Emerging_Tech_Bitcoin_Crypto.pdf
Bitcoin's main parts:
The open-source and versioned bitcoin software that governs how nodes, miners, and the bitcoin token operate.
The native kind of token, known as a bitcoin token, may be created by mining (up to 21 million can be created), and it can be transferred between wallet addresses in the bitcoin network.
Distributed Ledger, which contains exact copies of the database (or "blockchain") containing each transaction since the first one in January 2009.
distributed network of nodes (computers) running the distributed ledger replica together with the bitcoin software. They broadcast the transactions to other peer nodes after validating and accepting them.
Proof of work (PoW) is a cryptographic requirement that must be met in order for a miner to be granted permission to add a new block of transactions to the blockchain of the cryptocurrency bitcoin. It takes the form of a valid hash digest. In order to produce new blocks on average every 10 minutes, Bitcoin features a built-in difficulty adjustment function that modifies the valid hash requirement (length of nonce). PoW requires a lot of energy since it must continually generate new hashes at random until it satisfies the criteria.
The competing parties known as miners carry out continuous computing processing to address recurrent cryptography issues. Transaction fees and some freshly minted (mined) bitcoin are the rewards they receive. The amount of hashes produced each second—or hash rate—is a measure of mining capacity.
Cryptography, decentralization, and the proof-of-work consensus method are Bitcoin's most unique features.
Bitcoin uses encryption
Bitcoin employs this established cryptography.
Hashing
digital signatures based on asymmetric encryption
Hashing (SHA-256) (SHA-256)
Hashing converts unique plaintext data into a digest. Creating the plaintext from the digest is impossible. Bitcoin miners generate new hashes using SHA-256 to win block rewards.
A new hash is created from the current block header and a variable value called nonce. To achieve the required hash, mining involves altering the nonce and re-hashing.
The block header contains the previous block hash and a Merkle root, which contains hashes of all transactions in the block. Thus, a chain of blocks with increasing hashes links back to the first block. Hashing protects new transactions and makes the bitcoin blockchain immutable. After a transaction block is mined, it becomes hard to fabricate even a little entry.
Asymmetric Cryptography Digital Signatures
Asymmetric cryptography (public-key encryption) requires each side to have a secret and public key. Public keys (wallet addresses) can be shared with the transaction party, but private keys should not. A message (e.g., bitcoin payment record) can only be signed by the owner (sender) with the private key, but any node or anybody with access to the public key (visible in the blockchain) can verify it. Alex will submit a digitally signed transaction with a desired amount of bitcoin addressed to Bob's wallet to a node to send bitcoin to Bob. Alex alone has the secret keys to authorize that amount. Alex's blockchain public key allows anyone to verify the transaction.
Solution
Now, apply bitcoin to BGP. BGP generals resemble bitcoin nodes. The generals' consensus is like bitcoin nodes' blockchain block selection. Bitcoin software on all nodes can:
Check transactions (i.e., validate digital signatures)
2. Accept and propagate just the first miner to receive the valid hash and verify it accomplished the task. The only way to guess the proper hash is to brute force it by repeatedly producing one with the fixed/current block header and a fresh nonce value.
Thus, PoW and a dispersed network of nodes that accept blocks from miners that solve the unfalsifiable cryptographic challenge solve consensus.
Suppose:
Unreliable nodes
Unreliable miners
Bitcoin accepts the longest chain if rogue nodes cause divergence in accepted blocks. Thus, rogue nodes must outnumber honest nodes in accepting/forming the longer chain for invalid transactions to reach the blockchain. As of November 2022, 7000 coordinated rogue nodes are needed to takeover the bitcoin network.
Dishonest miners could also try to insert blocks with falsified transactions (double spend, reverse, censor, etc.) into the chain. This requires over 50% (51% attack) of miners (total computational power) to outguess the hash and attack the network. Mining hash rate exceeds 200 million (source). Rewards and transaction fees encourage miners to cooperate rather than attack. Quantum computers may become a threat.
Visit my Quantum Computing post.
Quantum computers—what are they? Quantum computers will have a big influence. towardsdatascience.com
Nodes have more power than miners since they can validate transactions and reject fake blocks. Thus, the network is secure if honest nodes are the majority.
Summary
Table 1 compares three Byzantine Generals Problem implementations.
Bitcoin white paper and implementation solved the consensus challenge of distributed systems without central governance. It solved the illusive Byzantine Generals Problem.
Resources
Resources
Source-code for Bitcoin Core Software — https://github.com/bitcoin/bitcoin
Bitcoin white paper — https://bitcoin.org/bitcoin.pdf
https://www.microsoft.com/en-us/research/publication/byzantine-generals-problem/
https://www.microsoft.com/en-us/research/uploads/prod/2016/12/The-Byzantine-Generals-Problem.pdf
Genuinely Distributed Byzantine Machine Learning, El-Mahdi El-Mhamdi et al., 2020. ACM, New York, NY, https://doi.org/10.1145/3382734.3405695