Smart Contract and ZK Circuit Security Audits

ABDK Consulting provides comprehensive security audits for blockchain protocols, DeFi applications, and zero-knowledge proof systems. With over 7 years of experience since 2016, the team has conducted 292+ audits for 136+ companies, securing over $118.74 billion in market cap and identifying 331 critical vulnerabilities across 473,257 lines of code.

Audit Expertise

The audit service covers multiple blockchain platforms and programming languages including Ethereum L1, Layer 2 solutions, Solidity, Cairo, Vyper, Rust (Solana, Near), and zero-knowledge circuit languages. The team has audited some of the most prominent protocols in the ecosystem including Uniswap v3 and v4, Aave v3, Starkware, 1inch, Scroll, Notional Finance, Yield Protocol, and Maverick.

Smart Contract Audits

Comprehensive security review of smart contract code through:

• Manual code review: Line-by-line examination by experienced security researchers
• Automated analysis: Leveraging proprietary and open-source tools for vulnerability detection
• Internal cross-review: Multiple auditors review findings to ensure accuracy
• Transparent working plan: Clear milestones and deliverables communicated upfront
• Follow-up guidance: Support for remediation and re-auditing of fixes
• Full confidentiality: Strict NDA and data protection protocols

Zero-Knowledge Circuit Audits

Specialized auditing for zero-knowledge proof circuits and zkVM implementations, leveraging deep cryptographic expertise:

• Circuit Correctness: Verification that circuits correctly implement intended computation, checking for soundness and completeness issues
• Constraint System Review: Analysis of constraint systems (R1CS, PLONK, AIR) to ensure proper variable constraints
• Security Vulnerabilities: Identification of cryptographic weaknesses, field arithmetic issues, malleability attacks, and proof forgery vectors
• Performance Optimization: Recommendations for reducing circuit size, proof generation time, and verification costs
• Trusted Setup Review: Evaluation of setup processes for systems requiring trusted ceremonies

Supported ZK proof systems: Groth16, PLONK and variants (TurboPLONK, UltraPLONK), STARKs, Halo 2, Bulletproofs, and custom recursive proof systems.

Vulnerability Categories

The audit service identifies vulnerabilities across all severity levels:

• Critical: Issues that could result in loss of funds, protocol shutdown, or complete compromise
• Major/High: Significant security risks affecting core functionality or limited fund loss
• Moderate/Medium: Issues affecting specific features or requiring specific conditions to exploit
• Minor/Low: Code quality, gas optimization, and best practice recommendations

Audit Deliverables

Clients receive:

• Comprehensive audit report with executive summary and technical findings
• Detailed vulnerability descriptions with proof-of-concept where applicable
• Risk ratings and severity classifications
• Actionable remediation recommendations
• Post-remediation review to verify fixes
• Public disclosure support (if desired)

Track Record

Recent audit highlights:

• Stakewise v3: Identified critical asset distribution flaw in liquid staking protocol
• Lumis: Discovered critical price handling bug and reentrancy vulnerability
• XO Market: Found arithmetic vulnerabilities in prediction market pricing
• Lombard: Identified high-severity token operation failures in Bitcoin liquid staking
• Starkware: Cairo language library and perpetual exchange circuit audits

The team has authored top cryptography publications in zero-knowledge proofs and brings academic rigor combined with practical blockchain engineering experience. ABDK's audit reports are valuable for building user trust and attracting institutional capital.