A FAIR OFF-LINE ELECTRONIC CASH SYSTEM WITH ANONYMITY REVOKING TRUSTEE

In this paper we present a new fair off-line electronic cash system which is able of coin tracing and owner tracing. The anonymity of the system can be revokable under certain conditions by an off-line trusted third party. In our scheme the trusted third party verifies the bank's signature of the e-coin and then records the tracing information, which is different from conventional electronic cash system.