Christian Huitema writes:
> > However, creating new publick/private key pairs is an incredibly
> > expensive operation, and one that a legitimate email wouldn't have to
> > do very often, but a spammer would if we just keep blacklisting their
> > keys.
>
> Uh? Creating a Diffie-Hellman public/private key pair is actually quite
> simple. Even an RSA pair is not all that hard, considering that a set of
> N prime numbers can generate N.(N-1)/2 key pairs. The logical
> consequence of authenticated e-mail is bound to be authenticated spam...
You don't see that as a step in the right direction?
Mike
