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    • 8. 发明申请
    • DATA PROCESSOR AND IC CARD
    • 数据处理器和IC卡
    • US20110264893A1
    • 2011-10-27
    • US13091899
    • 2011-04-21
    • Takashi ENDOShunsuke Ota
    • Takashi ENDOShunsuke Ota
    • G06F9/312
    • G06F9/30145G06F21/554G06F21/71
    • The data processor includes: a memory device for storing a program compiled by a compiler; and CPU operable to fetch an instruction code included by a program stored in the memory device. Further, the data processor has a filter for judging an instruction code which the compiler never outputs to limit, in action, CPU in case that CPU fetches the instruction code, which limits, in action, CPU in the case where the program is rewritten by not only an undefined instruction, but also an instruction other than an undefined instruction. The level of security is increased by limiting, in action, CPU.
    • 数据处理器包括:存储装置,用于存储由编译器编译的程序; 以及CPU,其可操作以获取由存储在所述存储器件中的程序所包括的指令代码。 此外,数据处理器具有用于判断编译器从不输出的指令代码的过滤器,以在CPU取出指令代码的情况下执行CPU来限制,CPU在程序被重写时 不仅是一个未定义的指令,而且还是一个指令,而不是一个未定义的指令。 通过限制CPU的安全性来提高安全级别。