3Miyazaki S,Sakurai K.A more efficient untraceable e-cash system with partially blind signatures based on the discrete logarithm problem[C] // In:FC'98.Berlin:Springer-Verlag,1998:296-307.
4Duc D N,Chen J H,Kim K.A forward secure blind signature scheme based on the strong RSA assumption[C] // In:ICICS 2003.Berlin:Springer-Verlag,2003:11-21.
5Chaum D,Pedersen T.Wallet Databases with Observers[C]//In:Advances in Cryptology-CRYPTO'92.Berlin:Springer-Verlag,1993:89-105.
6Okamoto T.An Efficient Divisible Electronic Cash Scheme[C]//In:Advances in Cryptology-CRYPTO'95.Berlin:Springer-Verlag,1992:438-451.
8Nakanishi T,Haruna N,Sugiyama Y.Unlinkable Electronic coupon protocol with Anonymity control[C]//In:ISW'99.Berlin:Springer-Verlag,1999:37-46.
9Solages A D,Traore J.An Efficient Fair Offline Electronic Cash System with Extensions to Checks and Wallets with Observes[C]//In:FC'98.Berlin:Springer-Verlag,1998:275-295.
10Maitland G,Boyd C.Fair Electronic Cash Based on a Group Signature Scheme[C] // In:ICICS 2001.Berlin:SpringerVerlag,2001:461-465.
