The Internet Protocol Journal - Volume 2, No. 1  Secure E-Mail:
Problems, Standards, and Prospects  Secure E-Mail: Problems,
Standards, and Prospects by Marshall T. Rose and David Strom  As
we spend more and more time using e-mail, most of us eventually
find that we need to be able to prove our identity to our
correspondents and secure the contents of our messages so that
others can't view them readily. Proving your identity is called
authentication. In the physical world, this is accomplished by
photo identification, such as a driver's license, passport, or
corporate identity card. When the time comes to prove who you
are (for example, before a major purchase), you show your card.
Your appearance and signature match the photo and signature on
your card, and the purchase is made.  On the Internet, however,
the process isn't as easy. Does e-mail from really originate
from our friend Sidney at the Example Corporation? Maybe it's
from someone else, who just happens to be using Sidney's machine
when he is out to