Blockchain Security Assessments
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Secure blockchain technology across your full stack
Blockchain applications are reshaping how we handle trust, automation, and ownership. But they also introduce new security risks that require a different kind of expertise. At Bureau Veritas Cybersecurity, we help you navigate that complexity, so you can deliver innovation that’s truly secure.
What We Assess
We work across the full blockchain stack, from smart contracts to underlying infrastructure:
- Smart Contract Audits
In-depth review of contract logic, access control, edge cases, and upgradability - DApp Assessments
Evaluation of decentralized applications, including on-chain and off-chain components - Protocol Layer Security
Assessment of consensus mechanisms, node configuration, and governance logic - Wallet and Custody Systems
Security reviews of key management, transaction flows, and multi-sig implementations - Infrastructure and APIs
Penetration testing of blockchain APIs, oracles, authentication systems, and supporting services - Privacy-Enhancing Technologies
We assess the design and implementation of privacy features such as zero-knowledge proofs (zk-SNARKs, zk-STARKs) and other privacy-preserving mechanisms that protect user and transaction data.
Our Approach
We go beyond code reviews and static analysis. Our security engineers think like attackers and test like defenders. Every engagement includes:
- Manual code analysis and business logic review
- Automated vulnerability scanning and fuzzing
- On-chain and off-chain threat modeling
- Hands-on exploitation testing and remediation advice
Advanced Security Tooling
We leverage both proprietary and open-source tools, including symbolic execution engines like Mythril, to uncover vulnerabilities that static analysis alone may miss.
We tailor each assessment to your project’s architecture, maturity, and threat model. Whether you're building on Ethereum, Avalanche, Polkadot, Hyperledger or a private chain, we’ve tested them all.
Blockchain Penetration Testing
We conduct full-stack blockchain penetration testing as part of every engagement. This includes both general and blockchain-specific targets:
- Web3 applications and APIs
- Smart contract execution paths
- Wallet and custody interfaces
- Consensus nodes and peer-to-peer communications
- On-chain and off-chain data flow validation
We apply black box, grey box, and white box testing techniques depending on your project’s architecture and threat model. Our methods follow recognized international testing standards and reflect current attacker techniques.
Unrivaled Blockchain Expertise
Our blockchain security team has delivered hundreds of audits and assessments since 2017. We’ve worked with fintech companies, protocol developers, exchanges, and Fortune 500 enterprises. Our engineers are well-recognized experts in the field, delivering sessions at OWASP, Blackhat, TruffleCon, New York Blockchain Week, and other conferences.
Meet the expert
Geoffrey Vaughan, Blockchain & Applied Crypto Lead
Director of Security Engineering
Geoffrey mined his first Bitcoin in 2011 and has been active in the blockchain space ever since. He leads a team of top-tier engineers finding critical bugs in blockchain infrastructure and Web3 libraries used by millions.
CISO
Global Blockchain Platform
Your team discovered issues that two other firms missed. Your findings and reporting were clearer and more actionable*.
* This feedback was provided before the integration with Bureau Veritas Cybersecurity. The same team now operates under our global brand
Let's talk about the security of your blockchain
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Why choose Bureau Veritas Cybersecurity
Bureau Veritas Cybersecurity is your expert partner in cybersecurity. We help organizations identify risks, strengthen defenses and comply with cybersecurity standards and regulations. Our services cover people, processes and technology, ranging from awareness training and social engineering to security advice, compliance and penetration testing.
We operate across IT, OT and IoT environments, supporting both digital systems and connected products. With over 300 cybersecurity professionals worldwide, we combine deep technical expertise with a global presence. Bureau Veritas Cybersecurity is part of the Bureau Veritas Group, a global leader in testing, inspection and certification.