Explicit Can Be Divided Into General-purpose Electronic Cash Systems Research And Design

This paper first discusses key technology of implementing electronic cash (e-cash) systems and two concrete schemes during development of universal e-cash systems, specially their solutions to achieve divisibility. This paper proposes an universal e-cash system based on partially blind signature which can be divided to small pieces of arbitrary number one time, so-called single-divisibility.The difficulty of universal e-cash systems research lies on how to implement their divisibility. The schemes proposed in this paper are based on SKOO system[12]. This paper adds transferability to SKOO system, further proposes the first off-line single-divisibility universal e-cash system which shop executes partial function of bank referring to its e-cash license. The other scheme adopts a binary tree approach as [E094] did. Security of them depends on DLP and secure hash functions. This paper also compares efficiency of the two schemes with Okamato95 system and easy come-easy go divisible e-ash system. Finally this paper shows a new partially blind scheme based on proxy signatures.