Users forget passwords all the time. This leads to
an email sent to an address whose password you ought to
have. If not, you may cascade back into your online
history, ending in your dial-in modem account with an
ISP that does not exist anymore.
Something is wrong here...
OpenPGP is a powerful technology for signing and encryption, because it
does not imply a stiffling key infrastructure. Instead, it uses a
Web Of Trust that is flexible... and complicating for new users. We now
introduce an approach to securely use OpenPGP without even that.
DKIM is the technology that signs a message and some of its headers
at a mail server en route; mostly this is done by the originator of
the email. One problem remains that slows down its introduction as a
hard filter, and that is email handling that edits the message and then
forwards it, as is common for email lists. This article nails the
integration of DKIM with forwarding.