multiple message destinations

Dean:

Are there other ways to handle sending to multiple receivers?

1) You can send it to a service which copies the message and resends it as many times as you need. Or send it yourself. 2) You can have the multiple recipients each share a key and let them trust each other. (Not recommended for the paranoid). 3) You can use a secret sharing system which is tied to a private key, such that revealing the secret allows for the derivation of the private key. The secret itself is a different private key. (I'm not up on the details of these schemes.) Eric