Security Analysis

DeFi Security
Audits Guide

DeFi security audits are professional reviews of smart contract code by firms like Trail of Bits, OpenZeppelin, and Consensys Diligence. Look for recent audits (within 12 months), multiple audit firms, resolved critical issues, and public audit reports before investing in any DeFi protocol.

Top Audit Firms:
  • • Trail of Bits (Tier 1)
  • • OpenZeppelin (Tier 1)
  • • Consensys Diligence (Tier 1)
Red Flags:
  • • No recent audits
  • • Unresolved critical issues
  • • Unknown audit firms
What to Check:
  • • Public audit reports
  • • Issue remediation
  • • Audit scope coverage

Learn how to evaluate DeFi protocol security through audit analysis and protect your investments

Top DeFi Audit Firms

Leading security auditing firms trusted by major DeFi protocols

Trail of Bits

(5)
Tier 1
Founded 2012

Specialty:

Comprehensive security audits

Notable Clients:

  • Ethereum Foundation
  • Chainlink
  • Uniswap

Key Strengths:

  • Deep technical expertise
  • Formal verification
  • Long track record

Consensys Diligence

(4.9)
Tier 1
Founded 2016

Specialty:

Smart contract security

Notable Clients:

  • MetaMask
  • Lido
  • Compound

Key Strengths:

  • Ethereum expertise
  • Tool development
  • Educational content

OpenZeppelin

(4.8)
Tier 1
Founded 2015

Specialty:

Security standards & audits

Notable Clients:

  • Aave
  • 0x Protocol
  • Coinbase

Key Strengths:

  • Industry standards
  • Open source tools
  • Security libraries

ChainSecurity

(4.7)
Tier 1
Founded 2017

Specialty:

Formal verification

Notable Clients:

  • Bancor
  • Ethereum 2.0
  • 1inch

Key Strengths:

  • Academic rigor
  • Formal methods
  • Research focus

Quantstamp

(4.6)
Tier 2
Founded 2017

Specialty:

Automated & manual audits

Notable Clients:

  • Maker
  • Crypto.com
  • Binance

Key Strengths:

  • Automated tools
  • Scale operations
  • Cost-effective

Halborn

(4.5)
Tier 2
Founded 2019

Specialty:

Blockchain security

Notable Clients:

  • Solana
  • Polygon
  • Avalanche

Key Strengths:

  • Multi-chain expertise
  • Incident response
  • Penetration testing

Security Audit Checklist

Essential criteria to evaluate when reviewing DeFi protocol audits

Audit Firm Credibility

  • Recognized auditing firm with proven track record
  • Previous audits of similar protocols
  • Public reputation and client testimonials
  • Team credentials and experience

Audit Scope & Depth

  • Complete smart contract coverage
  • Business logic verification
  • Access control mechanisms
  • Economic model analysis

Findings & Remediation

  • Clear categorization of issues (Critical, High, Medium, Low)
  • Detailed explanation of vulnerabilities
  • Evidence of issue remediation
  • Re-audit after fixes

Documentation Quality

  • Comprehensive methodology explanation
  • Code coverage metrics
  • Testing procedures documented
  • Clear recommendations provided

Security Red Flags to Avoid

Warning signs that indicate poor security practices in DeFi protocols

No Recent Audits

Critical

Protocol has not been audited in the last 12 months or has never been audited.

Unknown Audit Firm

High

Audited by unknown or unverified auditing firms without established reputation.

Critical Issues Unresolved

Critical

Audit reports show critical or high severity issues that remain unaddressed.

Limited Audit Scope

Medium

Audit only covers partial smart contracts or excludes key business logic.

No Public Audit Reports

High

Claims of being audited but no public audit reports available for verification.

Rushed Timeline

Medium

Very short audit periods that don't allow for thorough security analysis.

Security Due Diligence Process

Step-by-step process to evaluate DeFi protocol security

1

Find Audit Reports

Locate publicly available audit reports on the protocol's website or documentation

Checklist:

  • Check official website
  • Look in documentation
  • Search GitHub repositories
  • Verify on audit firm websites
2

Verify Audit Authenticity

Confirm audit reports are legitimate and from reputable firms

Checklist:

  • Cross-reference with audit firm
  • Check digital signatures
  • Verify report dates
  • Confirm scope matches protocol
3

Analyze Findings

Review identified vulnerabilities and their severity levels

Checklist:

  • Count critical/high issues
  • Understand vulnerability impact
  • Check remediation status
  • Review audit firm comments
4

Check Remediation

Verify that identified issues have been properly addressed

Checklist:

  • Compare before/after code
  • Look for re-audit reports
  • Check fix implementation
  • Verify testing coverage

Protocol Security Examples

Real examples of security practices in major DeFi protocols

Aave

Excellent

Audit Firms:

OpenZeppelin, Trail of Bits, Consensys Diligence

Last Audit:

2024

Security Highlights:

  • Multiple audits
  • Continuous security
  • Bug bounty program

Uniswap V3

Very Good

Audit Firms:

Trail of Bits, ABDK, ConsenSys Diligence

Last Audit:

2021

Security Highlights:

  • Comprehensive coverage
  • Math verification
  • Public reports

Compound

Good

Audit Firms:

OpenZeppelin, Trail of Bits

Last Audit:

2023

Security Highlights:

  • Regular audits
  • Community governance
  • Formal verification

DeFi.ly

In Progress

Audit Firms:

Pending - ChainSecurity scheduled

Last Audit:

Q2 2025

Security Highlights:

  • Formal verification planned
  • Economic audit included
  • Open source

Invest in Audited Protocols

Now that you understand security audits, explore DeFi protocols that prioritize security through comprehensive auditing and continuous monitoring.