Guardian · Chief Executive Officer
Owen Thurm
Owen leads Guardian. He has spent five years and hundreds of security reviews in complex DeFi: bespoke AMMs, novel lending, and the most advanced perpetuals exchanges in the world.
Resource Hub
Articles by Owen Thurm
41 guides and explainers, newest first.
Mutation Testing in Solidity With Gambit and Vertigo
Solidity Security Best Practices: 9 Keys
3 Critical Smart Contract Vulnerabilities Explained
How to Find Critical Vulnerabilities in Smart Contracts
Smart Contract Vulnerabilities List: 22 to Check First
13 Liquidation Vulnerabilities Every DeFi Auditor Must Know
5 Upgradeable Contract Vulnerabilities to Check
DeFi Reward Accounting Vulnerabilities: Stepwise Jumps
ERC-4626 Inflation Attack: 3 Red Flags and 2 Fixes
Smart Contract Audit Severity Levels Explained
6 Critical DeFi Vulnerabilities From Real Audits
What Is a CDP in Crypto? Abracadabra Money Explained
External Call Vulnerabilities in Solidity: 4 Attacks
Weird ERC-20 Tokens: 12 Edge Cases and a Checklist
DAO Governance Attacks: How Proposals Get Hijacked
How Does DAI Work? MakerDAO Explained
Oracle Manipulation Attacks: From Spot Price to TWAP
Advanced Web3 Security Course: Every Chapter
Rounding Errors in Solidity: Causes and Real Bugs
How to Become a Smart Contract Auditor
Sandwich Attacks in Crypto and Slippage Protection
Front Running Smart Contracts: How the Attacks Work
Upgradeable Smart Contracts Explained: 5 Patterns
Solidity Compiler Bugs: Dirty Bytes Arrays in Storage
Ethereum Calldata Explained: Decoding a Real Multicall
6 Smart Contract Audit Findings Explained
Formal Verification of Smart Contracts: A Guide
How to Prepare for a Smart Contract Audit
How the EVM Works: Stack, Memory, Calldata and Storage
21 Sneaky Solidity Bugs to Catch Before You Deploy
How to Write a Smart Contract Proof of Concept
Metamorphic Contracts and the Tornado Cash Exploit
Yul and Memory: A Low-Level Exploit
Reentrancy Attacks Explained: Every Type and How to Find It
GMX V2 Explained: Inside the Synthetics Exchange
Uniswap V3 Concentrated Liquidity Explained
The Constant Product AMM: Swaps, LPs and Impermanent Loss
Smart Contract Audit Mistakes: 27 Ways to Miss Bugs
Signature Malleability in Solidity, Explained
What Is secp256k1? Ethereum's Elliptic Curve Explained
How to Audit a Smart Contract: A Complete System
Podcast
Episodes hosted by Owen
29 conversations with the builders behind onchain protocols, on Finality and Permissionless.
