逻辑加密存储IC卡应用系统安全设计

逻辑加密存储卡的加密机制依赖的只是保存在IC卡中的几位固定数字组成的卡密码，其抗破译和窃取的能力与应用系统的安全设计有着非常紧密的关系。文章以SLE4442卡为具体对象，以提高整个应用系统的安全系数为目的，针对穷举法、中途拦截法、终端设备信息分析法等几种可能的攻击密码安全方法，系统地、全面地提出一个逻辑加密IC卡应用系统安全设计方案。

Secure Design of Security Memory Card Application System

Encipher mechanism of Memory Card with Security Logic only depends on the card key saved in the card which is compose of several fixed digits. Its ability of immunizing decipher and stealing has a close relationship with secure design of application system. In order to improve secure coefficient of the whole application system, the author uses the SLE4442 card as the specific object in this article. In accordance with several impossible attacking key secure methods, such as giving examples endlessly, intercepting halfway, analyzing terminal device's messages, etc. The author presents the systematic and overall secure design of Memory Card with Secur ity Logic application system.