Security - TechFi

Tornado Cash - A Fully Decentralized Protocol for Private Transactions on Ethereum

For the security of some types of data, such as salary payments, rent, etc., Tornado Cash (TORN) has provided a mixer that mixes all the transactions to cut the connection between the receiver and the sender.

A smartphone and blocks that implies for the identity ecosystem.

Security

Verifiable Credentials (VCs)

Verifiable Credentials, a new terminology proposed by W3C, is one of the main building blocks of the Self-sovereign Identity Ecosystem. This article will provide an explanation of its definition and mechanism.

Various elements that implies the blockchain and Rollups Technology

Security

Introduction to ZK-Rollups

Zk-rollup is a rollup-based technology that has gone viral in the blockchain world. It helps the system optimize security and reduce costs and transaction time by manipulating and compression at layer2. What are ZK-Rollups?Zero Knowledge Proofs operation. Source: miro.mediumAbout Zero-Knowledge proof: the method by which one party (the

A set of blockchain infrastructure and the a line of text Rollups

Security

An Overview of Rollups Technology

Rollup technology has gradually become popular in the blockchain with its application. To be more specific, it helps the system optimize security and reduce transaction costs by performing manipulation and compression at layer2.

The text zkSNARK with symbol of a key network

Security

zkSNARK - Zero-Knowledge Succinct Non-interactive Arguments of Knowledge

Introduction Zero-knowledge Succinct Non-interactive Arguments of Knowledge (zk-SNARK) is the genuinely innovative way of showing that something is true without giving any other information. The question here is, "why is it useful in the first place?". Zero-knowledge proofs are applicable to a wide variety of situations, including proving an assertion

Security

The exploit on Optimism: What if you are too optimistic?

On June 5th, 20M OP token was stolen. This amount of OP was supposed to send to Wintermute by Optimism Foundation, however, Wintermute provided the address of their multisig on Ethereum, which they did not control on Optimism. Before that, Wintermute confirmed that they received two test transactions with 1OP

Data Analysis

API3 - First-Party Oracle Solution for Oracle Problem

API3 is a secure and cost-efficient API solution that enables smart contracts on blockchain to interact with reliable real-time real-world data. The solution API3 introduces is Decentralized API (or dAPI for short) - a network of first-party oracles that provide traditional API services in a decentralized and blockchain-native manner. So,

Security

What is Reentrancy Attack and How to Prevent it?

Ethereum smart contracts are programs deployed as decentralized applications running on the blockchain network. The smart contract is the foundation for many applications such as cryptocurrency, gaming, banking, e-commerce, etc. However, the evolution of smart contracts also comes with security vulnerability and exploit methods. One of the most common exploit

A picture that depicts the lighting and the text "Flash loan."

DeFi

Flash loan - promising feature or a rising thread

The evolution of blockchain brought about the birth of decentralized finance (DeFi). The system aims to create a permissionless, decentralized, and transparent financial ecosystem built on blockchain. Every day, systems like Bitcoin are used to transfer a massive amount of value all around the globe. The new wave of DeFi

A picture that describes a boy wearing an astronaut hat with a thief depicting the exploit of the Akutars

Security

Dig deep into the Exploits of the Akutars

The contract that had vulnerabilities was deployed at 0xf42c318dbfbaab0eee040279c6a2588fa01a961d on Ethereum. Introduction to Akutars Akutars is an "avatar" NFT project consisting of 15,000 NFTs depicting a black boy wearing an astronaut hat, with many variations in costume, color, and background. That is the idea of Micah Johnson, a former

The symbol of Decentralized Autonomous Organization with a computer and a key

DeFi

Lines of code worth 60 million dollars in The DAO

What is The DAO?DAO (Decentralized Autonomous Organization) is an open-source project launched in April 2016 and aims to create a new business model for commercial and non-profit enterprises. The DAO works on the proposal of users who hold DAO tokens. They can stake Ether to receive DAO tokens and

Security

Certora Prover - Ensuring Smart Contract Security

About Certora ProverCertora has been the only team that offers Prover Technology for verifying security rules, which includes the following properties: Minimal false alarms: Certora Prover ensures that the reported errors are realFormal correctness guarantees: Certora Prover makes sure that there are no missed alarms for proven rulesFully automatic: Users

Bitcoin security that is implied by a lock and its key

Bitcoin and Ethereum

Is Bitcoin complete safety?

Bitcoin is one of the most famous and valuable blockchain networks nowadays. As its reputation and net worth skyrocketed, so did the temptation to possess one. Unfortunately, at the same time, news of millions of dollars worth of bitcoins getting lost or stolen is not uncommon. This article will introduce