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ISO/IEC CD 9798-5

Information security — Entity authentication — Part 5: Mechanisms using zero-knowledge techniques

General information

30.20     Sep 27, 2025

ISO/IEC

ISO/IEC JTC 1/SC 27

International Standard

Scope

ISO/IEC 9798-5:2009 specifies entity authentication mechanisms using zero-knowledge techniques:

mechanisms based on identities and providing unilateral authentication;
mechanisms based on integer factorization and providing unilateral authentication;
mechanisms based on discrete logarithms with respect to numbers that are either prime or composite, and providing unilateral authentication;
mechanisms based on asymmetric encryption systems and providing either unilateral authentication, or mutual authentication;
mechanisms based on discrete logarithms on elliptic curves and providing unilateral authentication.

These mechanisms are constructed using the principles of zero-knowledge techniques, but they are not necessarily zero-knowledge according to the strict definition for every choice of parameters.

Life cycle

PREVIOUSLY

PUBLISHED
ISO/IEC 9798-5:2009

NOW

PROJECT
ISO/IEC CD 9798-5
30.20 CD study/ballot initiated
Sep 27, 2025

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