Cryptography Playfair Cipher using Linear Feedback Shift Register
نویسندگان
چکیده
منابع مشابه
Linear Feedback Shift Register
A stream cipher is a symmetric cipher which operates with a time-varying transformation on individual plaintext digits. By contrast, block ciphers operate with a fixed transformation on large blocks of plaintext digits. More precisely, in a stream cipher a sequence of plaintext digits, m0m1 . . ., is encrypted into a sequence of ciphertext digits c0c1 . . . as follows: a pseudorandom sequence s...
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A data encryption technology which ensures secrecy of the data while being transferred over a long distance. It can provide about 80-85% data security as decoding of data involves inverting the feedback function or generating the binary sequence which will help in retrieving the data after some recombination operation.
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The playfair cipher operates on pairs of letters. The cipher text is broken into group of blocks, each block contains two letters. Encryption and decryption cipher depends on key search, which is a square matrix that contains 5x5 letters. The matrix contains every letter expect letter j. In this paper the cryptanalyst a playfair is presented using search techniques. It is a Memetic Algorithm, a...
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Bit swapping linear feedback shift register (BS-LFSR) is employed in a conventional linear feedback shirt register (LFSR) to reduce its power dissipation and enhance its performance. In this paper, an enhanced BS-LFSR for low power application is proposed. To achieve low power dissipation, the proposed BS-LFSR introduced the stacking technique to reduce leakage current. In addition, three diffe...
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ژورنال
عنوان ژورنال: IOSR Journal of Engineering
سال: 2012
ISSN: 2278-8719,2250-3021
DOI: 10.9790/3021-020512121216