Subject: [SIP] sip in mime

From: Michael Thomas <[email-masked]>
Date: Fri, 9 Feb 2001 08:04:50 -0800 (PST)

I scanned through the bis draft and it wasn't
immediately obvious to me whether you can embed
SIP headers in a MIME attachement. Specifically, I
was wondering whether it would be legit to embed
SIP headers and potentially recursively adding
MIME multipart into a SMIME attachement. Allowing
this would provide an arguably more standards
track way of transporting secure end to end SIP
headers in proxy routed messages. Even if you
prefer the existing PGP mechanism, it would seem
cleaner to place the PGP signed part into a MIME
attachement so that we can relax some of the weird
rules that I'm guessing are mainly an artifact of
MIME not being baked enough in that part of SIP's
evolution.

		      Mike

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