Design and Realization of Block Cipher Interface Function Based on COS

摘要

In order to realize multiple cryptograph service function efficiently on minitype security chip such as smart card, after understanding various encrypt and decrypt mechanisms of block cipher arithmetic and the definitions of each interface parameter, together with the work process of interface function under the control of parameters, we designed the logic framework and interface function based on COS. the realizations on different smart cards indicate that the logic framework and interface function could reconstruct relevant arithmetics in COS flexibly, and could provide seamless connection standard cryptograph service in different application systems.