TL;DR

• BSI, the UK's national standards body, has certified BNB Chain to ISO/IEC 27001 (information security) and ISO/IEC 27701 (privacy).
• The audit covers BNB Chain's own infrastructure: the systems that deploy and run smart contracts, key management, and the operational processes around them.
• Banks, asset managers, and governments already require ISO 27001 and 27701 as baseline vendor requirements. BSI's assessment gives them a third-party audit trail. 

What These Two Certifications Actually Are

ISO/IEC 27001 is the international standard for information security management. It does not certify a product as unhackable. It certifies that an organisation has a documented system for identifying security risks, controlling access, handling incidents, and reviewing all of it on a schedule, and that an accredited external auditor checked that system and found it working.

ISO/IEC 27701 extends the same system to personal data: how it is collected, who can see it, how long it is kept, and what happens when someone asks for it to be deleted.

Neither certificate is self-assessed. An external body audits against the standard and re-audits to keep the certificate valid. BSI, the UK's national standards body, carried out both assessments for BNB Chain.

What BSI audited

For 27001: BNB Chain's information security management system, covering the infrastructure that deploys and executes smart contracts and decentralised applications, along with the blockchain services and components supporting them.

For 27701: BNB Chain is designated a PII Controller, meaning it is treated as the party responsible for deciding how personal data is handled rather than a processor acting on someone else's instructions. The certified scope covers its infrastructure, key management systems, and the operational processes built around them, rather than internal company privacy policy alone.

Why Institutions Should Care

A bank or asset manager evaluating blockchain infrastructure runs the same due-diligence checklist it runs on any technology vendor: show us your information security management system, show us how personal data is handled, and show us that someone with no stake in the answer verified both.

In crypto, that evidence has usually come from wherever it was easiest to produce: an exchange's compliance page, a custody provider's trust center, a single vendor's audit report. Useful documents, but none of them cover the chain.

ISO 27001 and 27701 are already standard vendor-selection requirements inside traditional finance, and some institutions will not onboard a technology partner without them. For those counterparties, the answer is no longer "trust our security posture." It is a certificate, an assessor, and a published scope.

Why Certifying the Chain Layer is Different

Most ISO certifications that have shown up in crypto so far sit with an exchange or an individual vendor serving a network, each securing its own slice of the stack. That certification travels with the company, and it moves or lapses when the company or the product changes. It says nothing about the network underneath.

BNB Chain's certification sits a layer down on the infrastructure institutional partners are actually building on.

Moving Forward

For banks, asset managers, and governments evaluating BNB Chain for use, that's the kind of evidence procurement and risk teams look for before a partnership moves forward: an external audit trail.