in message
I need to password protect attachments to certain email addresses. How
do I
do it?
Have the recipient send you a digitally signed e-mail (which means they
must've gotten an e-mail certificate used to sign their messages).
They're free at Thawte. You then use their public key in that digitally
signed e-mail that you received from them to encrypt your message that
send to them. No one can view the contents of that encrypted e-mail
except the recipient who then uses their private key (that no one else
has) to decrypt your message.
You need their public key to encrypt your message that you send to them.
Easiest way to do that is to have them send you a digitally signed
e-mail. Then you save their cert in your e-mail program (usually by
adding them to your contacts list or address book) so you can use their
public key anytime you want to send them an encrypted message.
Obviously if they don't want you sending them encrypted mails then they
won't be giving you their public key.
