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    • 10. 发明授权
    • Apparatus and method for operating a symmetric cipher engine in cipher-block chaining mode
    • 用于在密码块链接模式下操作对称密码引擎的装置和方法
    • US08594321B2
    • 2013-11-26
    • US12257439
    • 2008-10-24
    • Ulrich MayerThomas KoehlerBernd Nerz
    • Ulrich MayerThomas KoehlerBernd Nerz
    • H04K1/00
    • H04L9/0637H04L2209/12
    • An apparatus is disclosed for operating a symmetric cipher engine (SCE) in cipher-block chaining (CBC) mode. The apparatus includes a crypto operation hardware including the SCE and an XOR stage, an apparatus for storing a chaining value including a state register of the SCE, an input latch supplying the crypto operation hardware with data, and an output latch. The data may be reordered for decipher operation. Furthermore, a method is disclosed for operating a SCE in CBC mode, wherein the method involves a crypto operation hardware that includes the SCE and an XOR stage supplied with data. The method also may include using a state register of the SCE to apply a chaining value. The method further may comprise reordering data supplied to the crypto operation hardware for decipher operation.
    • 公开了一种用于在密码块链接(CBC)模式下操作对称密码引擎(SCE)的装置。 该装置包括包括SCE和XOR级的加密操作硬件,用于存储包括SCE的状态寄存器的链接值,向密码操作硬件提供数据的输入锁存器和输出锁存器的装置。 数据可以被重新排序用于解密操作。 此外,公开了一种用于以CBC模式操作SCE的方法,其中该方法涉及包括SCE和提供有数据的XOR级的密码操作硬件。 该方法还可以包括使用SCE的状态寄存器来应用链接值。 该方法还可以包括将提供给密码操作硬件的数据重新排序以进行解密操作。