S/MIME encrypted e-mails

Hello, as far as I know, Thunderbird sends encrypted e-mails as an attachment named "smime.p7m". Can anybody let me briefly know what this file contains? I know this from previous e-mail conversation from this mailing list: "The sender generates an ephemeral 3-DES key one for each receiver, t

Encoding and comparing certificates with NSS

Hello. I have a problem with NSS. Here's what I'm trying to achieve: I have systems A and B which have a connection established. Then system C connects to system A through SSL, identifying itself with a client certificate. System C is then also expeted to connect to system B, and in doing so, it m