Improvement of 16X16 Playfair Cipher using Random Number Generator
نویسندگان
چکیده
منابع مشابه
6 X 6 Playfair Cipher using LFSR based Unique Random Number Generator
layfair cipher is the well-known multiple letter encryption cipher. Here the digraphs in the plaintext are treated as single units and converted into corresponding cipher text digraphs. However because of the drawbacks inherent in the 5 X 5 Playfair cipher which adversely affects the security we proposed a 6 X 6 Playfair cipher and then coupled it with Linear Feedback Shift Register based Uniqu...
متن کاملBreaking A Playfair Cipher Using Memetic Algorithm
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...
متن کاملNew Design of Crypto-Based Pseudo random number generator (CBPRNG) using BLOW FISH cipher
Random Number Generators (RNGs) are an important building block for algorithms and protocols in cryptography. Random number generation is used in a wide variety of cryptographic operations, such as key generation and challenge/response protocols. A random number generator outputs a sequence of 0s and 1s such that at any position, the next bit cannot be expected on the previous bits. However, tr...
متن کاملImprovement of True Random Number Generator Based on Ring Oscillator
In this report, we introduce the background of random number generator(RNG) and true random number generate based on ring oscillator(RO). We present the design of improved 3-edge Ring Oscillator and its layout. Based on Cadence spectre transient simulation tools, the output is recorded and then processed in Matlab,where the randomness tests are conducted. Keywords—TRNG; Simulation; Cadence;VLSI...
متن کاملMachine reconstruction of the Playfair cipher
A Playfair cipher is a digraph substitution, where each letter pair of the plaintext is replaced by a letter pair in the ciphertext. The chart of substitutions is summarized by the placement of letters in a table, called the Playfair square, constructed in some customary manner from a keyword. We denote a substitution of plaintext digraph cd with ciphertext digraph ab by ab− cd. There are two r...
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ژورنال
عنوان ژورنال: International Journal of Computer Applications
سال: 2014
ISSN: 0975-8887
DOI: 10.5120/16304-5527