Very silly but trivial to "implement" so I went ahead and did so:
To send a prism-proof email, encrypt it for your recipient and send it to irrefrangi...@mail.unipay.nl. Don't include any information about the recipient, just send the ciphertext (in some form of ascii armor). Be sure to include something in the message itself to indicate who it's from because no sender information will be retained. To receive prism-proof email, subscribe to the irrefrangible mailing list at http://mail.unipay.nl/mailman/listinfo/irrefrangible/. Use a separate email address for which you can pipe all incoming messages through a script. Upon receipt of a message, have your script attempt to decrypt it. If decryption succeeds (almost never), put it in your inbox. If decryption fails (almost always), put it in the bit bucket. (If you prefer not to subscribe you can instead download messages from the public list archive, but at some point I may discard archived messages and/or stop archiving.) The simple(-minded) idea is that everybody receives everybody's email, but can only read their own. Since everybody gets everything, the metadata is uninteresting and traffic analysis is largely fruitless. Spam isn't an issue because it will be discarded along with all the other mail that fails to decrypt for the recipient. Each group of correspondents can choose its own methods of encryption and key exchange. Scripts interfacing to, e.g., gpg on either end should be straightforward. Enjoy! </tongue-in-cheek> _______________________________________________ The cryptography mailing list cryptography@metzdowd.com http://www.metzdowd.com/mailman/listinfo/cryptography