I may be too simple-minded (I often am), but what's wrong with a truly
trivial MIME multipart/encrypted that just has:
content-type: multipart/encrypted; protocol=des-symmetfic
--gotcha
content-type: application/des-symmetric-key-id
Please use key number 5 in cbc-chained mode with IV 123456
--gotcha
content-type: application/octet-stream
incomprehensible
--gotcha--
Nothing's wrong with it (it was one of the alternatives I listed in my
original message). I just wanted to find out if anyone else was doing
it, and if so, what approach *they* took. It's a real-world interoperability
question, not a theoretical possibility question.
--Amanda