Smart Contract and Blockchain Protocol Audit

Comprehensive security audits of smart contracts and blockchain protocols using Hexens' unique dual-team methodology. Two independent security teams, each staffed by multiple senior auditors, perform parallel audits to ensure maximum coverage and detection of vulnerabilities. The service includes thorough analysis of contract logic, security best practices verification, vulnerability identification, and detailed reporting with remediation recommendations. Post-remediation retesting is always included. Hexens has completed over 130 audits for leading Web3 projects, with 90% of audit reports identifying critical vulnerabilities that could have resulted in significant financial losses.

Comprehensive Coverage

Smart Contract Languages: Solidity, Rust, Go, Cairo, and other smart contract languages across EVM and non-EVM blockchain platforms.

Protocol Types: DeFi protocols (DEXs, lending, yield aggregators), NFT marketplaces and collections, DAOs and governance systems, bridge and cross-chain protocols, staking and liquid staking protocols.

Layer 1 and Layer 2 Protocols: Specialized security assessments for blockchain infrastructure including consensus mechanisms, network architecture, protocol-level implementations, validator behavior, state management, and cross-layer communication. Experience auditing major protocols including zkSync, Polygon zkEVM, RISC Zero, Fuel Network, and TON.

Zero-Knowledge and Cryptography: Expert security reviews of zero-knowledge proof implementations (SNARKs, STARKs, Plonk, Groth16), fully homomorphic encryption (FHE), multi-party computation (MPC) protocols, and other novel cryptographic constructions. Analysis of ZK circuit implementations using Circom, Cairo, PIL, and other domain-specific languages, including detection of under-constrained circuits, soundness issues, and malleability vulnerabilities.

Audit Process

The audit begins with a high-touch strategy session led by senior security researchers who will oversee the engagement. Teams align on system design, threat modeling, and scope definition. Two dedicated teams then conduct independent reviews using manual analysis, automated tooling, and advanced fuzzing techniques. Findings are cross-verified between teams to eliminate blind spots and false positives. Final reports include executive summaries, technical details, severity classifications, and actionable remediation guidance.

Key Differentiators

Exclusive focus on each engagement (no parallel audits), involvement of senior researchers from initial scoping through final delivery, holistic approach that often identifies critical out-of-scope issues, and guaranteed post-remediation retesting. The team includes winners of 30+ international cybersecurity competitions and bug bounty hunters with over $1 million in confirmed findings. The cryptography security team includes researchers with advanced degrees in mathematics and cryptography.