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This Recommendation | International Standard will define those TTP services needed to support the application of digital signatures for the purpose of non-repudiation of creation of documents.

This Recommendation | International Standard will also define interfaces and protocols to enable interoperability between entities associated with these TTP services.

Definitions of technical services and protocols are required to allow for the implementation of TTP services and related commercial applications.

This Recommendation | International Standard focuses on:

  • implementation and interoperability;
  • service specifications; and
  • technical requirements.

This Recommendation | International Standard does not describe the management of TTPs or other organizational, operational or personal issues. Those topics are mainly covered in ITU-T Rec. X.842 | ISO/IEC TR 14516, Information technology — Security techniques — Guidelines on the use and management of Trusted Third Party services.