| As the Internet and E-Commerce become more and more popular, Network Security especially identity authentication, electronic signature, data encryption become a focus. People need an effective way to protect their information security. Smart Card can effectively protect the information security because it can store and explain the private signature key and certificate, realize digital signature and authentication. The SD interface has high transmission speed, plug and play, has little bulk, so the equipments with SD interface play an import role in the communication between computer and peripherals. The Key with SD technology will have good prospects in network security and E-commerce.SD Key develops from Smart Card. It is a new generation identify authentication product with cryptography technology, Smart Card technology and SD technology. SD Key will widely used in the information security field.The SD Key system includes hardware layer, kernel driver layer, standard middleware layer, application layer. This paper focused on the research of hardware layer. The hardware layer includes hardware circuit, COS and firmware code. In this paper, the SD interface protocol and ISO/IEC 7816 protocol are studied, upon which, the authenticate terminal is developed. It breaks through the traditional usage model of smart card in which smart card reader must be used. This authenticate terminal communicate directly with host through SD port.PC/SC protocol defines the interoperation system structure between IC and host. In this paper, PC/SC protocol is rearched based on which the diver development is introduced in this paper. |
