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2014 Biclique Cryptanalysis on the Full Crypton-256 and mCrypton-128
Junghwan Song, Kwanhyung Lee, Hwanjin Lee
J. Appl. Math. 2014: 1-10 (2014). DOI: 10.1155/2014/529736


Biclique cryptanalysis is an attack which reduces the computational complexity by finding a biclique which is a kind of bipartite graph. We show a single-key full-round attack of the Crypton-256 and mCrypton-128 by using biclique cryptanalysis. In this paper, 4-round bicliques are constructed for Crypton-256 and mCrypton-128. And these bicliques are used to recover master key for the full rounds of Crypton-256 and mCrypton-128 with the computational complexities of 2253.78 and 2126.5, respectively. This is the first known single-key full-round attack on the Crypton-256. And our result on the mCrypton-128 has superiority over known result of biclique cryptanalysis on the mCrypton-128 which constructs 3-round bicliques in terms of computational time complexity.


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Junghwan Song. Kwanhyung Lee. Hwanjin Lee. "Biclique Cryptanalysis on the Full Crypton-256 and mCrypton-128." J. Appl. Math. 2014 1 - 10, 2014.


Published: 2014
First available in Project Euclid: 2 March 2015

zbMATH: 07010670
Digital Object Identifier: 10.1155/2014/529736

Rights: Copyright © 2014 Hindawi


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