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    • 10. 发明授权
    • Cipher processor, IC card and cipher processing method
    • 密码处理器,IC卡和密码处理方法
    • US06466669B1
    • 2002-10-15
    • US09214271
    • 1998-12-31
    • Mitsuru MatsuiToshio Tokita
    • Mitsuru MatsuiToshio Tokita
    • H04L906
    • H04L9/0625H04L2209/122
    • The present invention can be applied to a cipher processing apparatus, which includes a function F having a configuration of repeating process and inside of the function F, a function f having a configuration of repeating process is included. According to the invention, the cipher processing apparatus is configured by registers 301 through 303 for temporarily holding data, selectors A through C, 311 through 313, and a function f operating circuit 323 for transforming data. An output data from the function f operating circuit 323 is held in the register C 303, and the selector C 313 selects either to repeat the data transformation by the function operating circuit 323 or not. When a cipher processing apparatus includes a function F having a configuration of repeating process and inside of the function F, a function f having a configuration of repeating process is included, the cipher processing apparatus can be embodied efficiently, which enables to reduce the circuit scale and to save electric power.
    • 本发明可以应用于包括具有重复处理的配置和功能F的内部的功能F的密码处理装置,包括具有重复处理的配置的功能f。 根据本发明,密码处理装置由用于临时保存数据的寄存器301至303,选择器A至C,311至313以及用于变换数据的功能f操作电路323构成。 来自功能f操作电路323的输出数据被保存在寄存器C 303中,并且选择器C 313选择由功能操作电路323重复数据变换。 当密码处理装置包括具有重复处理和功能F内部的配置的功能F时,包括具有重复处理配置的功能f,可以有效地实现密码处理装置,从而能够减小电路规模 并节省电力。