Aalanche properties and randomness of the Twofish cipher

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2004

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El, Ömer

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In this thesis, one finalist cipher of the Advanced Encryption Standard (AES) block cipher contest, Twofish proposed by Schneier et al, is studied in order to observe the validity of the statement made by Arikan about the randomness of the cipher, which contradicts National Institute of Standards and Technology (NIST)̕s results. The strength of the cipher to cryptanalytic attacks is investigated by measuring its randomness according to the avalanche criterion. The avalanche criterion results are compared with those of the Statistical Test Suite of the NIST and discrepancies in the second and third rounds are explained theoretically.

Subject Keywords

Electronics.

URI

http://etd.lib.metu.edu.tr/upload/12605571/index.pdf
https://hdl.handle.net/11511/14917

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Ö. El, “Aalanche properties and randomness of the Twofish cipher,” M.S. - Master of Science, Middle East Technical University, 2004.