ISO/IEC-18014-4 › Information technology - Security techniques - Time-stamping services - Part 4: Traceability of time sources
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- defines the functionality of the time assessment authority (TAA),
- describes an overall architecture for providing the time to the time-stamping authority (TSA) and to guarantee the correctness of it through the use of the TAA, and
- gives technical guidelines for the TAA to provide, and to provide assurance in, a trusted time source to the TSA.
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April 15, 2015
ISO/IEC JTC 1/SC 27