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Subject: Validation semantics of time-stamping
Following on from the issue that I raised at the DSS conference call .... I understand that some implementations of the XAdES / TS 101 733 time-stamping attributes / properties are applying the time-stamp after validation and using this to imply that the signature was valid at the time given in the time-stamp. However, I do not believe that there is any standard way to know whether whether a certain time-stamp is applied only if the signature is known to be valid at that time. So I have a question: - Is there something that can be added to the XAdES profile or some part of DSS to enable a party relying on an old signature to be know if the time-stamp was applied immediately subsequent to successful validation? Nick
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