Web3 Security & Smart Contract Auditing

End-to-End Security for Web3 and Decentralized Systems

Web3 is transforming finance, identity, governance, and infrastructure. But as capital and users flow into decentralized ecosystems, attackers follow. Smart contracts, protocols, and blockchain-based applications operate in high-stakes, highly adversarial environments where security failures can result in irreversible losses.At NotLAN, we provide full-spectrum Web3 security services, from smart contract auditing to full protocol assessments, to secure your decentralized stack before attackers exploit it.

Cybersecurity analyst pointing at dual monitors displaying smart contract code and a protocol architecture diagram in a dimly lit office.
Open laptop on a dark desk showing a Web3 metrics dashboard with transaction charts, addresses, and orange-highlighted data.
Tablet on a wooden desk displaying a “Smart Contract Auditing” interface with a circular token icon and blurred background data.

Our Web3 Security Services

• In-depth code reviews for vulnerabilities and logic flaws
• Verification of business logic, access control, upgradeability, and edge cases
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Platform coverage includes:
   • Solidity (EVM chains: Ethereum, Polygon, Arbitrum, Optimism, BSC,      Avalanche,etc)
   • Rust (Solana, NEAR, Aptos, Sui, etc)
   • Golang (Cosmos SDK, Tendermint-based chains, Hyperledger, etc)
• Full audit reports including findings, severity ratings, risk descriptions, remediation guidance, and code samples

Three monitors on a wooden desk displaying code and logos for Solidity, Rust, and Go, with a conference phone and smartphone in a dimly lit office environment.

Protocol & dApp Security Reviews

• Full system assessments beyond the contract level:
     • Oracle integrations
     • Cross-chain bridges
     • Layer-2 scaling solutions
     • Governance systems
     • Multi-sig and DAO infrastructure

• Business logic stress tests under adversarial conditions

3D-rendered image of stacked tokens featuring Solidity, Rust, and Go logos, with a central blue shield icon and a blockchain network graphic, all on a dark background.

Secure Design & Architecture Consultancy

• Advisory services for Web3 product teams building new decentralized applications
• Threat modeling, secure architecture design, and security-by-design integration at early    stages
• Help your protocol scale securely from day one

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Comprehensive Cybersecurity Coverage

We address not only on-chain vulnerabilities, but also off-chain and operational risks surrounding your Web3 application stack:

   • Social engineering & phishing scenarios targeting key personnel or communities
   • API integrations, backend systems, and admin interfaces
   • Authorization flaws, privilege escalations, and data leakage paths

Wooden desk with a laptop displaying cybersecurity metrics, a smartphone showing phishing alerts, and a printed diagram titled “Comprehensive Cybersecurity” illustrating threat vectors and data flow.

 Security in Web3 Is Not Optional

• Deployed contracts are immutable, vulnerabilities cannot be patched after exploitation.
• Attacks are fully automated, global, and financially motivated.
• Protocol failures affect not only code, but entire communities, treasuries, and   governance systems.
• Web3 security requires specialized offensive knowledge, the cost of mistakes is   permanent loss.

In Web3, prevention is not a luxury, it’s survival.

Laptop on a wooden desk displaying a deployment flowchart diagram with a “DEPLOY” button, next to a smartphone showing a QR code and an external drive, with server racks blurred in the background.

Why Work With NotLan?

✅ Deep technical expertise across multiple smart contract languages (Solidity, Rust, Golang)
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✅ Multi-chain and protocol-level assessment experience across DeFi, NFTs, bridges, DAOs, and more
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✅ Full-stack approach: on-chain + off-chain + organizational security
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✅ Custom security solutions tailored to your protocol’s unique architecture and threat profile
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✅ Direct collaboration with your development team to ensure actionable, practical remediations

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