Dave,
The general subject of multiple signatures in MIME-PEM has not been fleshed
out completely, but I can relay a couple of thoughts.
1. It ought to be possible to have multiple signatures within the signature
body without extra encapsulation. The syntax needs to be examined to make
sure this is possible, but there's no reason, in principle, why the sender
cannot put more than one signature to the signature section.
2. The semantics of multiple signatures is not defined. It might mean:
2a. Two people both approved and vouch for the document.
2b. One person signed with two forms of signature, e.g. a DSS and a RSA
signature, to facilitate acceptance by a wide range of recipients.
2c. Something yet different.
However, I think it is perfectly acceptable to leave the meaning of
multiple signatures up to the recipient.
Steve
--------------------
Steve Crocker
CyberCash, Inc. Work: +1 703 620 1222
2086 Hunters Crest Way Fax: +1 703 391 2651
Vienna, VA 22181
crocker(_at_)cybercash(_dot_)com