System and method for securing data

Cryptography – Communication system using cryptography – Data stream/substitution enciphering

Reexamination Certificate

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Reexamination Certificate

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08045707

ABSTRACT:
Systems and systems that protect data are provided. In one embodiment, a system may include, for example, a memory and a processor. The memory may store, for example, encrypted data. The processor may be coupled to the memory and may include, for example, a decryptor that decrypts the encrypted data. The decryptor may be adapted, for example, to variably bit roll the encrypted data, to fixedly bit shuffle the bit-rolled data, to add a first key to the bit-shuffled data and to process the added data with a second key.

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Bruce Schneier: “Applied Cryptography, Second Edition”, 1996, John Wiley & Sons, USA, pp. 270-272, 288, 308. XP002308630.

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