A.8.5 Secure authentication | ISO 27001 Control

Purpose

To ensure the authenticity of users and protect against unauthorized access.

Implementation Guidance

Implement multi-factor authentication (MFA)

Use strong password policies

Implement adaptive authentication based on risk

Use modern authentication protocols (OAuth, SAML)

Monitor authentication attempts and failures

Recommended Tools

Google Workspace

Complete suite including email, calendar, and SSO capabilities. Ideal for startups already using Gmail.

Microsoft 365

Enterprise productivity suite with strong security features and Azure AD integration.

Okta

Enterprise identity and access management platform providing SSO, MFA, and lifecycle management for secure authentication.

Auth0

ISO 27001 Services from the Directory

These providers can help you implement A.8.5 and achieve ISO 27001 certification.

Advisera

Provider of ISO 27001 documentation, training, and consultancy services to help businesses achieve compliance.

Anecdotes

Enterprise agentic GRC platform with 230+ integrations and 40+ pre-mapped frameworks for Fortune 500 compliance programs.

Arrow Cyber Advisors

Arrow Cyber Advisors enables organizations to build measurable cybersecurity maturity and resilience. We specialize in governance, risk and compliance advisory, providing clear security direction, maturity benchmarking, and execution support tailored to regulated and high-risk environments.