Study Of Digital Signature Smart Card Based On Permutation Code

With the rapid development of microchip and encryption techniques, the effect of Digital Signature Card, namely smart card supporting RSA algorithm and embedding microcontroller, is increasingly obvious in PKI system. Through it, people can easily do all kinds of on-line dealing all day at home, such as electronic business affairs, network bank, electronic government affairs, electronic insurance, and safety access.The symmetric algorithm mainly used in COS is DES at present. In this paper we mainly study the realization of digital signature card based on permutation code. We bring forward two schemes. One way is that we can realize this card on Java card, the other way is that we need to design a new COS on smart card chip. We regulate a Command-Response pair for the encryption/decryption operation based on permutation code, combining RSA and md5 used in COS safety module, and bring forward a safety transmission process for documentation. In this paper we also study the realization of encrypt algorithms used in smart card.