ISO/IEC 20009-4:2017Published

Information technology — Security techniques — Anonymous entity authentication — Part 4: Mechanisms based on weak secrets

Technologies de l'information — Techniques de sécurité — Authentification d'entité anonyme — Partie 4: Mécanismes basés sur des secrets faibles

Abstract / scope

ISO/IEC 20009-4:2017 specifies anonymous entity authentication mechanisms based on weak secrets. The precise operation of each mechanism is specified, together with details of all inputs and outputs. This document is applicable to situations in which the server only verifies that the user belongs to a certain user group without obtaining any information that can be used to identify the user later on.

Life cycle

Amendments & corrigenda

ISO/IEC 20009-4:2017/Amd 1:2026PublishedInformation technology — Security techniques — Anonymous entity authentication — Part 4: Mechanisms based on weak secrets — Amendment 1International Standard · Published 20 Oct 2026 · ISO/IEC JTC 1/SC 27