"Brian Tillman" wrote in message
...
Rome wrote:

I recently purchased a Email Certificate from Verisign for Encryption
and Digitally Signing My email and it works fine with everybody who
has outlook. Why is it that i cant send an encrypted email with
someone thats using yahoo? i was messing with sending myself an
encrypted email, and got it to work an hour later. why is it that in
order for me to send an encrypted message to someone i have to have
their certificated stored in my adress book?

Because when you send an encrypted message, you're not using your
certificate to encrypt it. They have to have a public key in order for
you
to encrypt a message to them. You encrypt using the recipient's
certificate's public key and they decrypt using their private key. The
encrypt and send you a message using your public key and you descript it
with your private key. In an exchange of encrypted messages, both sides
must have certificates because both sides need public/private keys.

Both sides need an S/MIME enabled mail client as well.
This is rather hard with Yahoo,
unless you use a desktop mail client
and not the original webmail interface.

Vizvary Istvan III
http://www.cryptigo.com