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    • 2. 发明授权
    • Semiconductor processing device and IC card
    • 半导体处理装置和IC卡
    • US08050085B2
    • 2011-11-01
    • US10521553
    • 2002-08-29
    • Masatoshi TakahashiTakanori YamazoeKozo KatayamaToshihiro TanakaYutaka ShinagawaHiroshi WataseTakeo KanaiNobutaka Nagasaki
    • Masatoshi TakahashiTakanori YamazoeKozo KatayamaToshihiro TanakaYutaka ShinagawaHiroshi WataseTakeo KanaiNobutaka Nagasaki
    • G11C7/10G11C11/40
    • G07F7/1008G06Q20/341G06Q20/40975G07F7/084G11C11/005G11C16/0425G11C16/0433G11C16/16
    • A semiconductor processing device according to the invention includes a first non-volatile memory (21) for erasing stored information on a first data length unit, a second non-volatile memory (22) for erasing stored information on a second data length unit, and a central processing unit (2), and capable of inputting/outputting encrypted data from/to an outside. The first non-volatile memory is used for storing an encryption key to be utilized for encrypting the data. The second non-volatile memory is used for storing a program to be processed by the central processing unit. The non-volatile memories to be utilized for storing the program and for storing the encryption key are separated from each other, and the data lengths of the erase units of information to be stored in the non-volatile memories are defined separately. Therefore, the stored information can efficiently be erased before the execution of a processing of writing the program, and the stored information can be erased corresponding to the data length of a necessary processing unit in the write of the encryption key to be utilized in the calculation processing of the CPU.
    • 根据本发明的半导体处理装置包括用于擦除第一数据长度单元上存储的信息的第一非易失性存储器(21),用于擦除第二数据长度单元上存储的信息的第二非易失性存储器(22),以及 中央处理单元(2),能够从/向外部输入/输出加密数据。 第一非易失性存储器用于存储要用于加密数据的加密密钥。 第二非易失性存储器用于存储要由中央处理单元处理的程序。 用于存储程序和用于存储加密密钥的非易失性存储器彼此分离,并且存储在非易失性存储器中的信息的擦除单元的数据长度被分开地定义。 因此,在执行写入程序的处理之前可以有效地擦除存储的信息,并且可以根据在计算中要使用的加密密钥的写入中的必要处理单元的数据长度来擦除存储的信息 处理CPU。