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Apparatus and method for modifying microprocessor system at random and maintaining equivalent functionality in spite of modification, and the same microprocessor system
Apparatus and method for modifying microprocessor system at random and maintaining equivalent functionality in spite of modification, and the same microprocessor system
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机译:用于随机修改微处理器系统并保持相同功能但不作修改的装置和方法,以及同一微处理器系统
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摘要
The present invention discloses a method for randomizing a microprocessor system, such as an IC card, in order to prevent the microprocessor system from being tampered with. The method ensures that the randomized microprocessor system realizes a functionality equivalent to that of an original microprocessor system and enables easy modification of a configuration of the microprocessor system. In the context of this disclosure, to randomize a microprocessor system means to randomize a microprocessor and a program included in the microprocessor system while maintaining an equivalence of functionality realized by the microprocessor system regardless of this randomization. According to the present invention, the method for randomizing a microprocessor system performing a given functionality consists in (a) randomizing items stored in a memory in accordance with randomizing information, and (b) randomizing a microprocessor so as to allow the microprocessor to have an access to the randomized items stored in the memory. Thus, a randomized microprocessor system performing a functionality equivalent to the given functionality is generated.
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