Home
News
- Bitcoin
- Regulation
- Hack & Scam
- Altcoins
- Stablecoin
- Blockchain
- Exchange
- NFT
Learn
Glossary

Home
News
- Bitcoin
- Regulation
- Hack & Scam
- Altcoins
- Stablecoin
- Blockchain
- Exchange
- NFT
Learn
Glossary

Search

Glossary

Learn Crypto

From Billionaire to Prison: The Story of Sam Bankman-Fried - Saints And Sinners #2

Join our newsletter

Your completely free resource hub designed to boost your knowledge of cryptocurrencies

(clear)

ALL 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

0
0x Protocol 0x is a publicly available as well as standard procedure used for the direct exchange of digital coins or tokens on the Ethereum blockchain. The most straightforward explanation of 0x is that it consists of designing tools and smart contracts that allow programmers to set up their own decentralized exchanges (DEXs), wallets, or trading areas without going through the hassle of starting from scratch. The main idea of 0x is to make token trading better. Instead of redirecting customers to a centralized exchange that could possibly take their money, smart contracts act as the communication channel thus the trading is done amongst the users. This also means the trades are more transparent, hacking has become less of a threat and the control over the users' assets is completely out of the question. With the 0x protocol, developers can add trading capabilities to any application or platform. A good example is when a wallet integrates 0x, and then the users are able to perform a token swap in no time. Moreover, the protocol is designed using an off-chain order relay plus on-chain settlement method, which leads to lowering gas fees and enhancing the speed of transactions. The ZRX token is the main currency of the network and is used for governance and fee distribution. The open-source nature of it allows anyone to not only use but also modify the 0x project as per their needs. To summarize, 0x is the foundation of decentralized trading enabling the emergence of a more transparent and effective digital currencies ecosystem not only on Ethereum but also beyond.
2
2FA Two-Factor Authentication (2FA) is a security process that requires two forms of verification to access an account, going beyond just a password. It would combine your password with maybe a code from a phone app. It might ask you for a PIN, your face, or your fingerprint, depending on the app. This kind of authentication is done to make it harder for hackers to get in. Because cryptocurrency transactions are so valuable and irreversible, 2FA becomes very important. You risk losing your money forever if you are unable to access a wallet or an exchange. For instance, when you log into Coinbase or Binance, you usually have to enter your password and then a 6-digit code that is time-bound and can be gotten from an app like Google Authenticator. To allow crypto payments to outside addresses, some sites or apps may send you a one-time password (OTP) message. While the concept of 'multi-factor' security has been around for decades, AT&T pioneered the digital version we recognize today. They patented a method for automated second-factor verification in the mid-1990s. Many banks started using them when ATMs came about. Later, companies like RSA Security popularized hardware tokens, which looked like fobs and generated time-based codes to gain access. Since its introduction, 2FA has strengthened security by reducing unauthorized access. Within the crypto ecosystem, it has prevented countless attempts at hacks and scams. Most apps and sites now use it, and it has evolved into multi-factor authentication (MFA) for broader protection. Simply put, 2FA acts as your digital bodyguard.
5
51% Attack A 51% attack is an event in which one individual or a collaborating group gains control over more than half of the entire hashing power of a blockchain network. In other words, the security of the network is directly related to the fact that no one is exceptionally powerful through the possession of that power. In case one surpasses the fifty percent threshold, he/she/they will be in a position to influence which transactions are validated. For instance, they can slow down the other miners, prohibit the addition of new blocks, or even reverse payments they made–this is called double-spending. Massive blockchains like Bitcoin or Ethereum cannot be attacked easily, since the amount of power required would cost billions of dollars to acquire and maintain. On the other hand, the smaller and newer blockchains could be the ones most at risk, as there have been several occurrences of such attacks on them in the past (like on the Ethereum Classic Blockchain). A 51% attack is a trigger for a full discussion of the advantages of decentralization in cryptocurrency. The more dispersed the computational power is, the more difficult it becomes for anyone to alter the past or to seize control from the community that supports the system.

Coin Medium ▸ Glossary ▸ Glossary

Stay ahead of the curve with expert crypto insights, guides, and market trends — join to our newsletter.

Founded in 2025, Coin Medium is a UAE-based crypto media platform focused on making crypto learning and news accessible to everyone.

Facebook Instagram X-twitter Linkedin Youtube Telegram

News

Bitcoin
Regulations
Hacks and Scams
Stablecoin
Altcoins
Blockchain
Exchange
NFT

Quick Links

About Us
Contact Us
Authors
Careers
Sitemap

Learn

Welcome to your completely free resource hub designed to boost your knowledge of cryptocurrencies, blockchain, NFTs, DeFi, and the Web3 universe.

No matter your level of experience — from curious beginner to market pro — you’ll find tailored guides, insights, and tutorials in our Beginner, Intermediate, and Advanced categories.

Popular Tags

What is Litecoi Block Reward Blockchain Layer-2 Revolution Crypto Bubble Crypto After Your Death Tokenization Unlocked Futures vs Options Crypto Airdrops

The content published on Coin Medium is intended solely for informational and educational purposes, not for financial, investment, legal, or other professional advice.

Privacy Policy
Terms and Conditions
Editorial Policy
Cookie Policy

Privacy Policy
Terms and Conditions
Editorial Policy
Cookie Policy

© Copyright 2025 All Rights Reserved | Coin Medium

Share this article

Search

Home
News
- Bitcoin
- Regulation
- Hack & Scam
- Altcoins
- Stablecoin
- Blockchain
- Exchange
- NFT
Learn
Glossary

Stay ahead of the curve with expert crypto insights, guides, and market trends — join to our newsletter.

JOIN OUR NEWSLETTER

Follow Coin Medium