Blockchain & Crypto Security Services

NSI Global provides independent advisory, assessment and forensic services for organisations and individuals exposed to blockchain and digital-asset risks. Services can cover smart-contract risk, wallet governance, transaction analysis, incident investigation and executive exposure.

NSI Global does not custody client assets, manage private keys or operate client wallets, exchanges or blockchain infrastructure. Services address technical, forensic and operational risk and do not constitute legal, financial or investment advice.

Our Services Include

Smart Contract Security Audit & Risk Advisory

Review smart-contract code, logic, access controls, external calls and oracle dependencies within the agreed scope. For EVM-based contracts, testing can be mapped to the OWASP Smart Contract Security Verification Standard and OWASP Smart Contract Top 10 2026.

Executive Digital Asset Risk Assessment

Assess wallet architecture, key-management practices, recovery arrangements, transaction-approval controls and exposure created by personal devices or accounts. NSI Global does not request, receive or retain seed phrases or private keys.

Crypto Investigations & Forensics

Analyse available on-chain transaction data and associated records to document asset movements, counterparties and relevant transaction paths. Findings may support legal advisers, investigators or recovery specialists but do not guarantee attribution or asset recovery.

DeFi & Exchange Exposure Assessment

Assess exchange integrations, liquidity-pool exposure, oracle dependencies, administrative controls and risks created by DeFi protocol interactions.

Custodial & Non-Custodial Risk Advisory

Assess hot, cold, multisignature and custodial wallet arrangements against operational risk, governance and recovery requirements.

Adversary Emulation for Blockchain Protocols

Conduct authorised threat scenarios involving flash-loan or oracle manipulation, compromised signing, phishing, access-control abuse and governance attack paths within agreed rules of engagement.

Adversary Emulation & Red Teaming Services

Blockchain Threat Intelligence

Monitor agreed public and lawfully accessible sources for blockchain-related phishing infrastructure, token impersonation, scams and fraud associated with specified brands, wallets or addresses.

Who We Work With

Crypto exchanges, DeFi platforms, and digital asset custodians
Fintech and Web3 Startups entering or scaling
HNWIs, Private Offices, and executives holding or transacting in digital assets
Traditional financial institutions exploring tokenised asset models

Why NSI Global?

Independent advisory model — no asset custody, token promotion or required product deployment.

Integrated expertise across cyber security, financial forensics, and blockchain ecosystems

Designed for matters involving significant privacy, regulatory and reputational sensitivity.

Secure Your Digital Assets

Speak with NSI Global’s blockchain and digital-asset risk advisers. Confidential consultations are available in person or through a client-approved Webex meeting.

1300 000 NSI (674)