Bottom line: ISO 27001:2022 requires secure authentication across four dedicated controls, operationalized through strong password policies, Conditional Access, and phishing-resistant MFA.
ISO 27001:2022 establishes specific requirements for secure authentication across four Annex A controls. CISOs must implement password policies, Conditional Access systems, and phishing-resistant multi-factor authentication to meet the standard’s mandates.
The updated ISO 27001:2022 treats authentication as a central security theme, anchoring control mechanisms in four Annex A controls. These requirements address the foundation of every modern access protection: verification of user identities before granting access to systems and data.
Password policies form the first line of defense. According to ISO 27001:2022, organizations must define minimum requirements — such as length specifications, complexity requirements, and expiration rules. At the same time, a so-called Conditional Access model is recommended, which can dynamically grant or block access based on device health, IP address, time of day, or user role. This reduces brute-force attacks and prevents unauthorized access through compromised credentials.
The key to standard compliance, however, lies in the implementation of phishing-resistant multi-factor authentication (MFA). In contrast to SMS-based or email-based methods, which are vulnerable to social engineering, phishing-resistant methods rely on hardware tokens or app-based cryptographic procedures. This closes the security gap left by password-only authentication. CISOs should implement these measures together and regularly verify that technical reality aligns with the standard’s requirements.
Source: www.computerweekly.com · Published 27 July 2026
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