I'm sure that would be a big help, although I'm not literate enough yet in the area of digital cash to understand how this would work.
Okay - actually, you don't need to be very familiar with digital cash at all. Just think of a cash accepting remailer as one in which you are charged a fee for each use. Similar to postage stamps and postal mail. When you want to use a digital cash accepting remailer, you would first purchase some postage stamps, certificates, however you want to think of it. Then, you attach the cash/stamp/certificate to the mail (maybe by a special header field), and send it to the remailer. Your mail would probably be encrypted as well to keep others from spying on your cash, altering it (rendering it invalid) and using it for themselves. The remailer would validate your cash, probably store it in a file to prevent multiple uses, and then forward your mail to wherever. The digital cash part just means electronic forms of payment which have cash properties. Say you purchase something with cash. The merchant can't link your identity to the cash, and later when the merchant deposits cash in a bank, the bank cannot link the cash to your transactions with the merchant. But the merchant can verify the cash is valid, and the bank can too. Furthermore, you can't spend the same piece of cash twice. This is confusing to think about without being familiar with modern crypto; one of these days I shall finish a digital cash application I've been working on for people to play with. /-----------------------------------\ | Karl L. Barrus | | elee9sf@menudo.uh.edu | <- preferred address | barrus@tree.egr.uh.edu (NeXTMail) | \-----------------------------------/