On Sat, 25 May 2002, Averroes wrote:

> Hi All,
>
> Perhaps someone has the answer?
>
> I want to sign a file (provided by a requester) with some information
> like : hash+timestamp, then, transforms this signed file in PKCS7 structure
> for sending back to the requester.
>
> Any help will be appreciated.

This looks like "detached signature" PKCS7 with "signing time" and
"message digest" on authenticated atributes list.

Please note lots of papers available on timestamping techniques.
One may want to include references to ajacent hashes as a proof

hope this helps,
Vadim

>
> Regards
>
> #-------
> Averroes
>
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