This part of ISO/IEC 11770 defines key management mechanisms based on asymmetric cryptographic
techniques. It specifically addresses the use of asymmetric techniques to achieve the following goals.
1) Establish a shared secret key for a symmetric cryptographic technique between two entities A and B by
key agreement. In a secret key agreement mechanism, the secret key is the result of a data exchange
between the two entities A and B. Neither of them can predetermine the value of the shared secret key.
2) Establish a shared secret key for a symmetric cryptographic technique between two entities A and B by
key transport. In a secret key transport mechanism, the secret key is chosen by one entity A and is
transferred to another entity B, suitably protected by asymmetric techniques.
3) Make an entity's public key available to other entities by key transport. In a public key transport
mechanism, the public key of entity A must be transferred to other entities in an authenticated way, but
not requiring secrecy.
Some of the mechanisms of this part of ISO/IEC 11770 are based on the corresponding authentication
mechanisms in ISO/IEC 9798-3.
This part of ISO/IEC 11770 does not cover aspects of key management such as
-- keylifecycle management,
-- mechanisms to generate or validate asymmetric key pairs,
-- mechanisms to store, archive, delete, destroy, etc. keys.
While this part of ISO/IEC 11770 does not explicitly cover the distribution of an entity's private key (of an
asymmetric key pair) from a trusted third party to a requesting entity, the key transport mechanisms described
can be used to achieve this. A private key can in all cases be distributed with these mechanisms where an
existing, non-compromised key already exists. However, in practice the distribution of private keys is usually a
manual process that relies on technological means like smart cards, etc.
This part of ISO/IEC 11770 does not cover the implementations of the transformations used in the key
management mechanisms.
NOTE To achieve authenticity of key management messages, it is possible to make provisions for authenticity within
the key establishment protocol or to use a public key signature system to sign the key exchange messages.
ISO/IEC 11770-3:2008 Referenced Document
ISO/IEC 10118 Corrigendum 1 - Information technology - Security techniques - Hash-functions - Part 4: Hash-functions using modular arithmetic
ISO/IEC 14888 IT Security techniques — Digital signatures with appendix — Part 3: Discrete logarithm based mechanisms*， 2018-11-12 Update
ISO/IEC 11770-3:2008 history
2021ISO/IEC 11770-3:2021 Information security - Key management - Part 3: Mechanisms using asymmetric techniques
2017ISO/IEC 11770-3:2015/Amd 1:2017 Information technology — Security techniques — Key management — Part 3: Mechanisms using asymmetric techniques — Amendment 1: Blinded Diffie-Hellman key agreement
2016ISO/IEC 11770-3:2015/Cor 1:2016 Information technology - Security techniques - Key management - Part 3: Mechanisms using asymmetric techniques; Technical Corrigendum 1
2015ISO/IEC 11770-3:2015 Information technology - Security techniques - Key management - Part 3: Mechanisms using asymmetric techniques
2009ISO/IEC 11770-3:2008/Cor 1:2009 Information technology — Security techniques — Key management — Part 3: Mechanisms using asymmetric techniques — Technical Corrigendum 1
2008ISO/IEC 11770-3:2008 Information technology - Security techniques - Key management - Part 3: Mechanisms using asymmetric techniques
1999ISO/IEC 11770-3:1999 Information technology - Security techniques - Key management - Part 3: Mechanisms using asymmetric techniques