COS系统一般围绕着COS所服务的智能卡/IC特点而开发的,受到智能卡内微处理器芯片的性能及内存容量的限制。i OS外置安全密码模块的COS系统是专门针对信大捷安SSX1207安全芯片开发,主要功能包括安全算法、安全认证及与PC、i OS设备的通信。针对有限资源实现了一套微型文件系统。 COS systems are typically developed around the features of the smart card / IC served by COS and are limited by the performance and memory capacity of the microprocessor chip in the smart card. The iS OS External Security Crypto Module’s COS system was developed specifically for the BTEX SSX1207 security chip. Its main features include security algorithms, secure authentication, and communication with PC and i OS devices. A miniature file system has been implemented for limited resources.