> Does a whitelist filter a single stack for signed messages? Yes.
> The SecureCard thing is the same as having a Think Cash that publishes a > private key and monitors the corresponding public key stack for entries. I don't see any reason to have think cash on subscription with a whitelist. If someone wants to spam you then they can dish out the think cash to subscribe and the mechanically spam. The purpose of a whitelist is to only allow people on that are not probable spammers. The way to filter a whitelist is to subscribe by sending your public key and some kind of credentials (not think cash) and then filter messages which are not signed by a known public key. > I haven't been keeping up with f-mail at all, is there a way to create a > private channel?
