On 2009-12-10 02:12 PST, Gregory BELLIER wrote: > Hi everyone ! > > I noticed the 3DES cipher is used to encrypt emails with S/MIME and I > would like to use another one.
According to the version of S/MIME standards that are implemented in Mozilla mail clients, you can only encrypt using one of: a) the ciphers that the correspondent has previously informed you that it supports (which it would have done by sending you a signed email message), or b) using the one cipher that all S/MIME implementations of that era were REQUIRED to implement to ensure interoperability. If you have NOT received any signed emails from the correspondent to whom you wish to send encrypted email, then you have no choice but to use the one required cipher. If you HAVE received a signed email from that correspondent, then your Mozilla email client will automatically pick the strongest cipher that is mutually supported. You CANNOT send a message encrypted in a cipher that your email program does not KNOW that your correspondent supports. -- dev-tech-crypto mailing list dev-tech-crypto@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-tech-crypto
