-----BEGIN PGP SIGNED MESSAGE----- Some cpunks a couple of months ago told us about "agnostic" e-cash anonymity schemes in which the e-bank accepts both blinded and un-blinded coin requests, leading to anonymity or non-anonymity at the choice of the client. They pointed out how this would be very easy to implement, based on the current Chaumian system. I think this is an excellent idea for social-engineering reasons and I congratulate them on bringing it up. (Unfortunately I don't have time right now to look up who it is that I am congratulating...) Perhaps a similar "polymorphism" could be implemented with regard to on-line/off-line clearing. When you as a payee receive a Chaumian Ecash coin, you can choose based on several factors (including reputation of the payer if he chooses to make his nym known to you, size of the transaction, time of day, or whatever) to either accept it immediately and credit the payer with whatever it is you are selling, or to delay completion of the transaction while you attempt to deposit the coin with your e-bank. (If you are wary of "payee-ID proof stings" like Lucky Green is, then you can go ahead and launder your coin through an anon account during this interval...) If your payer has already spent this coin, then the bank will inform you immediately and you can cancel the transaction. (And take whatever other actions you consider appropriate...) It seems like such a scheme would include all of the advantages (off-line clearing) of Chaumian Ecash as well as those (double-spending prevention) of the on-line clearing systems. Thus, TCMay's objections to current Chaumian Ecash would not apply to this new variation. I hope that this isn't an old-news yawner to you experts. Regards, Bryce Announcement: I'm going to be fading off the the c'punks list for a while, so be sure and Cc: me if you want me to read your post. signatures follow "To strive, to seek, to find and not to yield." <a href="http://ugrad-www.cs.colorado.edu/~wilcoxb/Niche.html"> bryce@colorado.edu </a> -----BEGIN PGP SIGNATURE----- Version: 2.6.2 Comment: Auto-signed under Unix with 'BAP' Easy-PGP v1.01 iQCVAwUBMIauO/WZSllhfG25AQGXHwP+MEpnPvpj81fV66HEb8rozlMepnol3nj5 /d73LQpMxB7fLcMEDmISNQef/eU39zId8EZ1XCW7X3AujMBa4OjuBgl3+vdrAKo9 DIb6imXxc+E9dyHp0i9y/FZtzkOXKF6Abwy3SYMOSyaI2HsiCyUx2tEW/6OzDJTi 7YyOqR+FkNQ= =cpK7 -----END PGP SIGNATURE-----