Patent ID: 6446052
Filing Date: 2002-09-03
Classification: G06Q

Abstract:
A method for obtaining certification from a trustee, the trustee being an authority independent of an electronic currency issuing entity, the trustee certifying the revocable anonymity of the identity of an entity and its association with at least one unit of electronic currency, the method comprising the steps of:transmitting to a trustee information representing at least one unit of electronic currency; transmitting to the trustee information uniquely identifying an entity associated with the at least one unit of electronic currency; and receiving from the trustee a trustee token comprising a trustee electronic signature, the trustee electronic signature certifying the revocable anonymity of the entity associated with the at least one unit of electronic currency, the trustee electronic signature being derived from a blinded representation of the at least one unit of electronic currency such that the authenticity of the trustee electronic signature with respect to the at least one unit of electronic currency can be verified by an entity other than the trustee.