What is ISO 27001 Encryption?

What is Encryption?

ISO 27001 Encryption is a way of scrambling information so that it can’t be read by just anyone. Think of it like a secret code. You use a key to lock the information, and only someone with the right key can unlock it to see the original message.

Examples

Sending a private message to a friend online. The app uses encryption to make sure only your friend can read it.
Protecting your credit card details when you shop on a website. The website uses encryption to keep your information safe.

Context

In the world of ISO 27001, which is about keeping information safe, encryption is a key tool. It helps companies protect their important information, like customer details or business secrets, from being seen by people who shouldn’t see it. It’s a way of making sure that even if someone gets the information, they can’t understand it.

Relevant ISO 27001 Controls

The following controls from the ISO/IEC 27001:2022 standard are related to encryption:

About the author

Stuart Barker

ISO 27001 Ninja

Stuart Barker is a veteran practitioner with over 30 years of experience in systems security and risk management. Holding an MSc in Software and Systems Security, he combines academic rigor with extensive operational experience, including a decade leading Data Governance for General Electric (GE).

As a qualified ISO 27001 Lead Auditor, Stuart possesses distinct insight into the specific evidence standards required by certification bodies. His toolkits represent an auditor-verified methodology designed to minimise operational friction while guaranteeing compliance.