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Subject: RE: [dss] RE: ProcessingOptions example and discussion
At 10:39 AM 9/2/2003 -0400, Tim Moses wrote: >Colleagues - Forgive me if I have missed a step in this discussion. But, for >my part, I would like to see an enumeration of all anticipated compound >operations, That would be a big step forward. The compound operations I see are: - sign-with-timestamp - verify-then-sign (i.e. "update" or "refresh") Do we want to support others? There was a little talk at the f2f of doing multiple signatures or verifications in a single request/response, but I think we decided against that. >an enumeration of the technical options for supporting compound >operations and a discussion of the pros and cons of each approach. > >Without giving it too much thought, it seems to me that there are at least >four possible approaches ... > >1. All operations are atomic. Compound operations are built by clients >making multiple calls to different services. Some technique for linking the >output of one operation to the input of the next would have to be defined. > >2. Request messages can be concatenated, with an option to indicate that the >input token in one request is to be the output token from the previous >request. > >3. All operations (including compound ones) are identified by their own >request type identifier. We would define a few useful ones. Others could >define their own in profiles. Each compound-operation message should be >derived from the general message syntax defined in the core document. > >4. Compound operations are variants of our existing sign, timestamp and >verify request types. All variations in syntax would have to be captured in >the basic syntax. That's a good list. I'd like to first understand what compound operations are in scope, and then return to the list in deciding what mechanisms are needed. Trevor
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