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Non-repudiation software standards are published by ISO and IEC. They include the ISO/IEC 13888 series, which cover symmetric and asymmetric techniques.

ISO/IEC 13888-1:2020

Information security - Non-repudiation - Part 1: General

This document serves as a general model for subsequent parts specifying non-repudiation mechanisms using cryptographic techniques. The ISO/IEC 13888 series provides non-repudiation mechanisms for the following phases of non-repudiation: evidence generation; evidence transfer, storage and retrieval; and evidence verification. Dispute arbitration is outside the scope of the ISO/IEC 13888 series.

ISO/IEC 13888-2:2010

Information technology - Security techniques - Non-repudiation - Part 2: Mechanisms using symmetric techniques

The goal of the non-repudiation service is to generate, collect, maintain, make available and validate evidence concerning a claimed event or action in order to resolve disputes about the occurrence or non-occurrence of the event or action. ISO/IEC 13888-2:2010 provides descriptions of generic structures that can be used for non-repudiation services, and of some specific communication-related mechanisms which can be used to provide non-repudiation of origin (NRO) and non-repudiation of delivery (NRD). Other non-repudiation services can be built using the generic structures described in ISO/IEC 13888-2:2010 in order to meet the requirements defined by the security policy. ISO/IEC 13888-2:2010 relies on the existence of a trusted third party (TTP) to prevent fraudulent repudiation or accusation. Usually, an online TTP is needed. Non-repudiation can only be provided within the context of a clearly defined security policy for a particular application and its legal environment. Non-repudiation policies are defined in ISO/IEC 10181-4.

ISO/IEC 13888-3:2020

Information security - Non-repudiation - Part 3: Mechanisms using asymmetric techniques

This document specifies mechanisms for the provision of specific, communication-related, non repudiation services using asymmetric cryptographic techniques.


As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.