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Turing (cipher). Lambert M. Surhone

ID: 5550733

Lambert M. Surhone

Turing (cipher)

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c. 136
2010 г.



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High Quality Content by WIKIPEDIA articles! Turing is a stream cipher developed by Gregory G. Rose and Philip Hawkes at Qualcomm for CDMA. It is designed to be fast in software and achieves around 5.5 cycles/byte on some x86 processors. Turing generates 160 bits of output in each round by applying a non-linear filter to the internal state of an LFSR. In cryptography, a stream cipher is a symmetric key cipher where plaintext bits are combined with a pseudorandom cipher bit stream (keystream), typically by an exclusive-or (xor) operation. In a stream cipher the plaintext digits are encrypted one at a time, and the transformation of successive digits varies during the encryption. An alternative name is a state cipher, as the encryption of each digit is dependent on the current state. In practice, the digits are typically single bits or bytes.

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