-->In article <312A921F-00000001(_at_)neibelheim(_dot_)gte(_dot_)com>,
Jueneman(_at_)gte(_dot_)com wrote:
[...]
Jueneman> To the best of my knowledge, none of the available e-mail systems
directly
Jueneman> support such a usage, and the last time I checked Ned Freed indicated
that MIME
Jueneman> didn't have all of the pieces in place to support such a reference to
a signed,
Jueneman> perhaps encrypted external document.
Jueneman> It seems to me that we need to make progress on two fronts -- first
the
Jueneman> definition of an extended, multimedia object that not only can
directly contain
Jueneman> multiple parts, but can also securely reference external documents or
document
Jueneman> parts via a secure embedded URL.
[...]
We have developed a security add on for the message/external-body
MIME-bodypart. It's called MROSS - Mime Referenced Object Security
Services. The simple idea is to transfer security information of a
protected refenced data object within the external-body bodypart. At
3rd ACM CCS in March there is a paper about this approach. Look at
http://www.csl.sri.com/acm-ccs/ccs3/program.txt . I will put a
PS-version (it prints well, despite ghostview reports errors) into our
projects WWW-page http://www.fokus.gmd.de/ovma/mmmsec/ .
Burkhard Wiegel
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