Chapter 1: Introduction to Blockchain & Smart Contract Security
A blockchain is a decentralized, distributed ledger maintained by a network of nodes. Ethereum introduced the concept of a Turing-complete state machi...
Chapter 2: Smart Contract Vulnerabilities
Reentrancy is arguably the most famous smart contract vulnerability, responsible for the 2016 DAO hack. It occurs when a contract calls an external un...
Chapter 3: Smart Contract Auditing Tools
Automated tools are essential for identifying low-hanging fruit and complex edge cases in smart contracts. They fall into several categories: static a...
Chapter 4: Defensive Design & OpenZeppelin
To mitigate vulnerabilities, the Ethereum community has developed standardized, peer-reviewed libraries. **OpenZeppelin** is the gold standard for sec...
Chapter 5: Web3 Bridge & Oracle Security
Beyond smart contract code, systemic risks in Web3 exist at the architecture layer, specifically concerning cross-chain communication and off-chain da...
Chapter 6: Hands-On Lab: Reentrancy Attack & Remediation
This lab provides a self-contained Python script using `web3.py` and the `py-solc-x` compiler to simulate a local blockchain environment, deploy a vul...
Chapter 7: References & Further Reading
The field of Web3 security evolves rapidly. Stay up to date by regularly reviewing these definitive resources, vulnerability registries, and tool docu...
Blockchain & Smart Contract Security Guide
Welcome to the Blockchain & Smart Contract Security Guide. This module dives deep into the complex world of Web3 security, exploring the unique threat...