Abstract:This article has presented a Structural cryptanalysis on MRVLK (Message Based Random Variable Length Key Encryption). In this cipher, key length is started from small amount of bits and then will be grown in size. The cipher has variable rounds, random bitwise rotations and dynamic key length that provide resistance to linear and differential cryptanalysis. In spite of these advantages, some disadvantages are observed such as correlation between the ciphertexts in each stage which facilitates structural attack… Show more
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