Abstract:

Analyzes disadvantages of traditional authentication on IC card, and proposes an improved IC card authentication method based on userdefined algorithm environment so as to avoid attacks. Cards can be authenticated by various algorithms according to userdefined algorithm environment. The supported algorithms can be categorized into DES algorithms and 16 byte packet length algorithms. Users can use the algorithm specified by command to complete the smart card authentication, thus achieving certain permissions and completing the certification authority of the required operation. Meanwhile, the paper proposes another method to avoid attacks, which can guarantee the safety of data transport by limiting the use times of external authentication key even if the system is under attack.

Key words: IC card;augorithms environment;authentication method;avoid attacking