Format of MIME “multipart/signed”

Content-Type: multipart/signed;

protocol=“TYPE/STYPE";

micalg="MICALG"; boundary="Signed Boundary"

--Signed Boundary

Content-Type: text/plain; charset="us-ascii"

This is some text to be signed although it could be

any type of data, labeled accordingly, of course.

--Signed Boundary

Content-Type: TYPE/STYPE

CONTROL INFORMATION for protocol "TYPE/STYPE" would be here

--Signed Boundary--

First body part is signed. “Content-” header(s) included to protect integrity of MIME labeling of the signed data.

First body part, if text, is plaintext. Canalways be read, even if it can’t be verified.

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