What is Web3 Security?
Web3 security addresses the unique security challenges of decentralized applications (dApps), smart contracts, and blockchain technologies. It encompasses both traditional security concerns and novel attack vectors specific to the Web3 ecosystem.
Key Attack Vectors
Smart Contract
- Reentrancy attacks
- Integer overflow/underflow
- Logic errors
- Access control flaws
Wallet/User
- Phishing attacks
- Private key theft
- Social engineering
- Malicious approvals
Protocol
- Flash loan attacks
- Oracle manipulation
- Governance attacks
- Bridge exploits
Security Practices
Smart Contract Audits
- Code review
- Formal verification
- Bug bounties
Secure Development
- Established patterns
- Testing frameworks
- Upgrade mechanisms
Monitoring
- Transaction monitoring
- Anomaly detection
- Incident response
Common Vulnerabilities
| Vulnerability | Description |
|---|---|
| Reentrancy | Recursive calls |
| Front-running | Transaction ordering |
| Access control | Permission flaws |
| Oracle manipulation | Price feed attacks |
Security Tools
Static Analysis
- Slither
- Mythril
- Securify
Testing
- Foundry
- Hardhat
- Brownie
Best Practices
- Multiple audits
- Bug bounties
- Timelocks
- Multi-sig wallets
- Gradual rollouts
- Insurance coverage