A user registers a user public key PKU as a pseudonym at a trustee or issuer and obtains an signature for the pseudonym as a license. The sends the pseudonym, PKU identification information IdU and the amount of withdrawal x to the issuer institution. The issuer increments a balance counter of the pseudonym...http://www.google.fr/patents/US7222108?utm_source=gb-gplus-shareBrevet US7222108 - Electronic cash implementing method and equipment using user signature and recording medium recorded thereon a program for the method
Electronic cash implementing method and equipment using user signature and ...
