Re: spam

Tony writes:

> Rather than passing a token, require the mail to
> be encrypted with the public key of the recipient.
Public-key encryption of an entire e-mail is extremely processor-intensive.
Even conventional encryption is very time-consuming.  You can just hash it
and sign the key.

However, this would be a problem for people in countries that outlaw
encryption.  What would they do?

> ... and provide an incentive for the ISPs to
> actually deploy a PKI.
Who would you trust to certify keys?