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Subject: RE: [dss] Observations on TST
fine - Nick > -----Original Message----- > From: Tim Moses [mailto:tim.moses@entrust.com] > Sent: 18 August 2003 21:41 > To: 'Trevor Perrin'; Nick Pope; 'DSS' > Subject: RE: [dss] Observations on TST > > > Colleagues - I'll work on a revision of the Timestamp token specification. > Specifically ... > > 1. Import and use the ds:Signature element definition. > 2. Introduce an optional Issuer element. > 3. Leave the Accuracy and Ordered elements as they are until we have > completed further discussion and come to a conclusion. > 4. Leave out the nonce for now. The issuer/serial will serve to uniquely > identify the token. We can easily add it back, should we subsequently > decide we need it. > > All the best. Tim. > > -----Original Message----- > From: Trevor Perrin [mailto:trevp@trevp.net] > Sent: Friday, August 15, 2003 2:57 PM > To: Nick Pope; 'DSS' > Subject: RE: [dss] Observations on TST > > > At 09:32 AM 8/15/2003 +0100, Nick Pope wrote: > > > Trevor wrote: > > > One thing that worries me about the Accuracy field, as in RFC > > > 3161 and the > > > Entrust proposal, is that the client has to add and subtract the > Accuracy > > > field with the timestamp time to determine the upper and lower bounds. > > > > > > Isn't this non-trivial? The client might have to know how many > > > days are in > > > each month, leap-years, leap-seconds, that sort of thing. > > > > > > Would it be easier for the server to explicitly return an upper and > lower > > > bound, instead of an Accuracy? > > > > > > >I am not expecting that the upper and lower bounds is the main > interest. I > >see accuracy as a quality indicator. Changing to upper and lower bounds > >make it much more difficult to decide whether the time-stamp is accurate > >enough for my purposes. > > That's true. I wonder if there's anyone with experience using > RFC 3161 who > can tell us how useful Accuracy is, and what it's most commonly used for. > > Trevor > > > You may leave a Technical Committee at any time by visiting > http://www.oasis-open.org/apps/org/workgroup/dss/members/leave_wor kgroup.php
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