On Tue, Apr 01, 2008 at 12:47:45AM +1300, Peter Gutmann wrote: > Ben Laurie <[EMAIL PROTECTED]> writes: > > >And so we end up at the position that we have ended up at so many times > >before: the GTCYM has to have a decent processor, a keyboard and a screen, > >and must be portable and secure. > > > >One day we'll stop concluding this and actually do something about it. > > Actually there are already companies doing something like this, but they've > run into a problem that no-one has ever considered so far: The GTCYM needs a > (relatively) high-bandwidth connection to a remote server, and there's no easy > way to do this.
Cell phones have that. The bigger problem is pairing with the local POS (or whatever), which is where NFC comes in -- the "obvious" thing to do here is to make this pairing not-really-wireless (e.g., the cell phone could scan a barcode from the POS, or the POS could scan a barcode displayed by the cell phone, or both, or any number of variants of this). > (Hint: You can't use anything involving USB because many corporates lock down > USB ports to prevent data leaking onto other corporates' networks, or > conversely to prevent other corporates' data leaking onto their networks. Same > for Ethernet, Firewire, ...). Right, it's got to be wireless :) Nico -- --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to [EMAIL PROTECTED]