ISO DIS 20215

Description / Abstract: The algorithms contained in this document are recommended for use on space missions with a requirement for information (e.g., data, voice, and video) confidentiality, authentication, or authenticated confidentiality. The algorithms may be employed on any or all mission communications links such as the forward space link (e.g., telecommand), the return space link (e.g., telemetry, science data), as well as across the ground data network. They could as well be used to ensure confidentiality and authenticity of stored data.

A symmetric algorithm assumes that all communicating entities possess a shared secret (i.e., a ‘key') which enables them to encrypt, decrypt, and authenticate information shared among them. The manner in which the shared secret is distributed and managed (key management) is not within the scope of this document. Further information on key management can be found in Space Missions Key Management Concept (reference [B22]).

APPLICABILITY

This Recommended Standard is applicable to all civilian space missions with a requirement for information confidentiality, authentication, and authenticated confidentiality.

While the use of security services is encouraged for all missions, particularly on command links, the results of a risk analysis may reduce or eliminate its need on a mission-by-mission basis.