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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Public-Key Infrastructure (X.509) Working Group of the IETF.
Title : Internet X.509 Public Key Infrastructure Time Stamp
Author(s) : C. Adams, P. Cain, D. Pinkas, R. Zuccherato
Filename : draft-ietf-pkix-time-stamp-12.txt
Pages : 25
Date : 21-Nov-00
A time stamping service supports assertions of proof that a datum
existed before a particular time. This document describes the format
of a request sent to a Time Stamping Authority (TSA) and of the
response that is returned. It also establishes several security-
relevant requirements for TSA operation, with regards to processing
requests to generate responses. A TSA may be operated as a Trusted
Third Party (TTP) service, though other operational models may be
appropriate, e.g. an organization might require a TSA for internal
time stamping purposes.
Non-repudiation services [ISONR] require the ability to establish the
existence of data before specified times. This protocol may be used as
a building block to support such services. An example of how to prove
that a digital signature was generated during the validity period of
a public key certificate is given in an annex.
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