Electronic cash (E-cash) is widely used due to the electronic commerce being in vogue. The date attached E-cash can apply for some services such as interest calculation, expired date processing, etc. In this paper, we propose two E-cash schemes with date attachable: the basic scheme with a better efficiency and the advanced scheme with an extensible date. The most remarkable contribution is that the advanced scheme can express any readable date with the relative year concept and still has a marvelous efficiency improvement as well as the basic scheme has.
Applied Mechanics and Materials, V.284-287 : 3444-3448.