The Application Of Smart Card In E-Commerce And One-off Blind Public Key

In e-commerce, for resolving the security problems, smart card has been applied widely. Combining with the actual experience, the main application of smart card in e-commerce is proposed: CSP & PKCS#11 based on smart card, the technic of writing CSP & PKCS#11 is present,some characteristic schemes are proposed too.A concept of one-off blind public key is proposed in this article. In the design of one-off blind public key protocol, the idea about blind signature and group signature is utilized, and the concept of one transform blind signature is firstly proposed, the concept of blind signature is developed.The main property of one-off blind public key protocol is as follows: It just need CA issues the generative factor of blind public key one time for the user, and the user can generate his different public keys each time he uses it. So this scheme can ensure the disconnection among the user's actions, and CA can reveal the user's identity under the court 's grant to prevent the user committing, but anyone else doesn't have this ability. At the same time, this scheme can ensure the user can't forge one-off blind public key without CA. It means one-off blind public key has property one-off ability, public key changeability, disconnection among the user's actions, unforgeability and unfraudulence.Two new schemes about one-off blind public key protocol are proposed. The security of them is based on factorization. One-off blind public key generated by the first can be used in Shamir's signature scheme based on identity. The other scheme can generate one-off blind public key based on RSA, it can be used in encryption and signature, so one-off blind public key can be used in all kinds of applications. Baesd on one-off blind public key protocol, the applications about two schemes are proposed.One-off blind public key protocol not only can protect user's privacy, but also can ensure user can't commit by making use of one-off public key. Compared with other schemes, one-off public key protocol has property of simpleness and strong maneuverability. In this protocol, CA's burden is reduced greatly, so it is a practical scheme.Baesd on one-off blind public key, the concept of one-off blind public cert is proposed, it will benfit the farther development of one-off public key's application.