PPS is primarily a protocol for public-key cryptography key-exchange.
It is important to remember that PPS is not, by default, about securely
encrypting your email, it's just a way to get some of the hard work of
cryptography out of the way.
5/9 -- PPS IS NOT DEAD! I just want to let folks know that I've just
started a new job, and PPS will be a bit slow in development for a bit.
As I get settled in, work on PPS will resume.
If you want to get involved drop me some mail, and I will be happy to
parsel out work on the spec, reference library or plug-ins.
3/27 -- The SourceForge site will be going up this week. Also, major
changes are being made to the spec. MIME formatting is becoming much more
strict due to the need to support Web-based mailers (incoming, at
least).
3/20 -- I've just finished a lot of changes, and have put the new
work-in-progress version up as HTML as
well as the usual POD source. Please,
feel free to comment, as version 2.0 rapidly approaches, and many
changes will no longer be possible for quite some time (though
minor, compatible changes will likely continue for a while).
3/15 -- IMPORTANT The spec is undergoing a major change, and the
Work in Progress document reflects that change. The format of the
X-PPS-Version is being updated. Please make note of this
change if you are planning to work on an MUA. The new spec version number
will be 2.0 when it is released because of this incompatible change.
3/15 -- Made some changes to the Work in Progress
version to reflect suggestions from the GnuPG mailing list.
3/13 -- I am currently working on a reference library to be used by compliant
MUAs. If you want to help with the library or make your MUA compliant,
please contact me.
3/13 -- The
work-in-progress (WIP) version of the specification
has been put on the PPS home-page. This is a POD source version of
the spec, and it may change, seemingly at random.
3/13 -- RFC2119 compliance has been added to the
WIP.