-----BEGIN PGP SIGNED MESSAGE----- On 12 Feb 1997 janke@unixg.ubc.ca wrote:

It's not too hard: The payee forwards a blinded, non-signed coin to the payer. The payer has the bank sign this, and then returns it to the payee who strips out the blinding factor.

This is correct except for the fact that the payer also has to apply a blinding factor to the coin, thus making it a "double-blinded" coin. It gets signed by the bank, the payer divides the coin by the blinding factor and sends it to the payee, who then strips out his blinding factor. Ecash coins can also be laundered making the above scheme mostly unnecessary. Since most people will probably not look upon fully anonymous ecash highly, laundering will be a more popular option as it cannot be prevented. Mark -----BEGIN PGP SIGNATURE----- Version: 2.6.3 Charset: noconv iQEVAwUBMwJkjyzIPc7jvyFpAQFHcwgAm2TZXg3wVDCtXyHBdq7WX44iA+nIvmHJ GlcXCjyKBEmvRPfkvU/NUnS1cRfjsPh5ZmjNwjBc21lwxjcOLFtu+3Mcd6tNoyYQ 4Abp4lvJLnpGAtAVeSeTAw+7mzwrC0jfWgt2meNbnyp2WxLxg/JA7VGGkS39g4Jm +i3F8H00mFJfmZUGpAiywE7GNobCXeppPJOn/QHA4/FrWJx5hE39qgB7U+AFwYVP PHGy4SSSBeKWciK83DU3Bz6ptygznL7fHW4vOZ8UM5QZjbyiDomVriSuJHw0lKdH r63BhOqYPXgMHgsa28XTlI9AWN5PpaIbvORTHOWv40EF3nGVrWGnMw== =Vpit -----END PGP SIGNATURE-----