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Web3 Security Insights

Deep dives into smart contract vulnerabilities, DeFi exploit analysis, and security best practices — written by the team that built a 1,200+ exploit pattern database.

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✍️Best Practices

Writing Secure Solidity: A Developer's Guide to Defensive Smart Contracts

Practical guidelines for writing secure Solidity from the start — defensive patterns, common pitfalls, testing strategies, and the mindset shift from web2 to web3 security.

Kennedy OwiroNov 210 min read
Solana Security

Anchor Program Security: Securing Solana Smart Contracts with the Anchor Framework

Security best practices for Solana programs built with Anchor — account validation, constraint macros, CPI security, and the most common Anchor-specific vulnerabilities.

Kennedy OwiroOct 309 min read
🧪Best Practices

Testing Smart Contracts for Security Vulnerabilities: Beyond Unit Tests

Advanced testing strategies for smart contract security — fuzz testing, invariant testing, formal verification, and test-driven security with Foundry and Hardhat.

Kennedy OwiroOct 279 min read
🔒Smart Contract Security

Implementing ReentrancyGuard: More Than Just a Modifier

A deep dive into reentrancy guard implementations — OpenZeppelin's ReentrancyGuard, custom guards, transient storage in EIP-1153, and when guards aren't enough.

Kennedy OwiroOct 247 min read
Best Practices

Secure Token Approval Patterns: Preventing Approval Exploits in DeFi

How token approvals create security risks and how to implement safe approval patterns — infinite approvals, permit, permit2, and approval hygiene.

Kennedy OwiroOct 217 min read
🏗️Best Practices

Building a Secure DeFi Protocol from Scratch: A Security-First Architecture Guide

How to architect a DeFi protocol with security as a core design principle — from initial design through deployment and monitoring.

Kennedy OwiroOct 1811 min read
⬆️Smart Contract Security

Smart Contract Upgrade Patterns: Safe Proxy Implementations for Production

A practical guide to upgrade patterns — Transparent Proxy, UUPS, Diamond (EIP-2535), and Beacon proxies. When to use each and how to avoid upgrade-specific vulnerabilities.

Kennedy OwiroOct 159 min read
🚨Best Practices

Emergency Response: What to Do When Your Protocol Gets Hacked

A step-by-step incident response playbook for DeFi protocols — from detection to containment, communication, recovery, and post-mortem.

Kennedy OwiroOct 129 min read
🔗Smart Contract Security

Security Best Practices for Cross-Chain Bridge Development

How to build more secure cross-chain bridges — validator architecture, message verification, rate limiting, emergency controls, and lessons from $2B+ in bridge exploits.

Kennedy OwiroOct 910 min read

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