Abstract:

To overcome the shortcoming that only a single mode is supported when the traditional smart card transmits data,an improved security strategy based on mode control word for IC card data transmission is proposed.The mode control word supports multiple data transmission modes, while data can be transmitted in plain text,ciphertext, plaintext MAC,ciphertext MAC. Read and write mode control word of the basic file (including transparent file, linear file) is used to regulate transmission security conditions for reading and writing documents.Meanwhile, we propose to use the two write attributes ("prohibited append" or "prohibited update" ) to restrict the write operation of the basic file.According to their demands,users can configure different data transmission settings for read command and write command thus improving the flexibility and the security of data transmission.     

Key words: IC card;mode control word;data transmission;security strategy