I talked to Don Davis today. I am writing this note to share his reaction
to my summary of this thread.
First, he is pleased to see the working group addressing the subject line
issue. While this issue was not part of his initial concerns, he agrees
that it deserves a solution.
Second, he would like to see the working group mandate the inclusion of the
TO, CC, and FROM lines whenever encryption and signature are used
together. As he explained in is I-D, he does not believe that many users
are able to understand the interaction between signing, encrypting, or both
(in either order).
Third, he would like to see the TO, CC, and FROM lines automatically
processed by the receiving mail agent software. While he acknowledges the
issues associated with BCC, mail lists, and so on, he firmly believes that
the people writing the software understand the situation much better than
mass market e-mail users.
Fourth, he would like to see the working group mandate the inclusion of the
TO, CC, and FROM lines whenever the sending agent or the receiving agent
represents a human. In other words, computer-to-computer communications
may not need these to be protected.
This e-mail, its content and any files transmitted with it are intended
solely for the addressee(s) and are PRIVILEGED and
CONFIDENTIAL. Access by any other party is unauthorized without the express
prior written permission of the sender. If
you have received this e-mail in error you may not copy, disclose to any
third party or use the contents, attachments or
information in any way, Please delete all copies of the e-mail and the
attachment(s), if any and notify the sender.