Blockchain Audit
Distributed ledger systems power transparent and tamper-resistant applications, but bugs in smart contracts or network configurations can lead to irreversible losses. EJN Labs helps you secure your blockchain deployments by identifying critical flaws in smart contracts, node configurations, and on-chain processes before they are exploited. Whether you operate on Ethereum, Hyperledger Fabric, or other platforms, our audits provide clear insights and practical recommendations to fortify your blockchain ecosystem.
Why Choose EJN Labs
Certified Security Experts
Our team is made up of professionals with industry-recognized certifications such as OSCP, OSWE, and CEH.
Global Client Support
We work with clients around the world, offering flexible delivery options for different time zones and compliance needs.
Standards-Based Testing
Our methodology is aligned with industry best practices and security standards including OWASP Top 10 and ISO 27001.
Aftercare and Re-Testing
Once the assessment is complete, we stay involved to help interpret results and verify fixes through optional re-testing.
Securing Your Blockchain Ecosystem
A blockchain audit examines your smart contracts, consensus processes, and network configurations to uncover vulnerabilities that could lead to financial losses, data manipulation, or unauthorized access. This audit is essential for ensuring trust, preserving immutability, and maintaining regulatory compliance.
Smart Contract Review
We perform manual and automated code reviews of your contracts to detect reentrancy risks, integer overflows, access control issues, and business logic flaws. We also check integration points such as oracles and cross-chain bridges.
On-Chain Behavior Testing
We deploy contracts to testnets and simulate real-world interactions, observing transaction flows, gas usage anomalies, and event emissions. This lets us identify race conditions, unintended state changes, and consensus edge cases.
Combining smart contract review with on-chain behavior testing provides a full picture of your blockchain security, covering both code correctness and runtime resilience.
Blockchain Security Assessment
Smart Contract Vulnerabilities
Identify issues such as reentrancy, unchecked sends, integer overflows, and improper access controls in contract logic.
Consensus & Network Security
Evaluate node configuration, peer connectivity, firewall rules and consensus parameters to prevent forks or eclipse attacks.
Key Management & Wallet Security
Review private key storage, multi-sig setups, and hardware security module (HSM) integration to safeguard signing credentials.
Data Privacy & Transaction Integrity
Assess encryption of off-chain data, usage of zero-knowledge proofs or mixers, and protection against front-running or transaction replay.
Node Configuration & Upgrade Processes
Inspect deployment scripts, container templates and upgrade mechanisms to ensure safe rollouts and rollback procedures.
Third-Party Dependencies & Oracles
Audit external data feeds, library versions and bridge contracts for known vulnerabilities and trust assumptions.
Governance & Compliance Controls
Examine on-chain governance models, role-based permissions and compliance with regulatory frameworks such as GDPR or SEC guidelines.
Why Blockchain Audit Matters
EJN Labs conducts blockchain audits using techniques modeled on real-world attacks and failure scenarios. We expose both technical and process-level risks, then deliver concise, prioritized reports so your teams can implement fixes with confidence.
Build. Scale And Secure with EJN Labs.
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