At 01:30 +0100 on 10/17/2013, Richard Clayton wrote about Re:
[ietf-smtp] DKIM encryption, was Request for discussion:
erk ... you don't generally wish to use public keys on whole messages,
the planet is getting pretty warm already -- there are practical reasons
why existing schemes involve encrypting with a stream cipher with a
randomly chosen session key and then just using the public key system
for transmitting the session key.
How about doing the message encryption with the stream cipher and use
the public key to encrypt it as a separate MIME part (ie: The message
is multi-part with the key MIME part and the encrypted MIME part)?
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