Practical security against differential cryptanalysis of extended feistel network
Immunity against differential cryptanalysis is an important measure in designing symmetric ciphers. Practical security is a measure to evaluate this immunity by estimating the minimum number of differential active s-boxes. A cipher with more s-boxes is said to have better immunity against differenti...
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my.utm.254122017-08-02T06:30:13Z http://eprints.utm.my/id/eprint/25412/ Practical security against differential cryptanalysis of extended feistel network Ibrahim, Subariah Maarof, Mohd. Aizaini Salihin Ngadiman, Mohd. QA75 Electronic computers. Computer science Immunity against differential cryptanalysis is an important measure in designing symmetric ciphers. Practical security is a measure to evaluate this immunity by estimating the minimum number of differential active s-boxes. A cipher with more s-boxes is said to have better immunity against differential cryptanalysis. In this paper, we evaluate the immunity of three types of Extended Feistel Network (EFN) with Substitution-Permutation (SP) round function and compare it with a balanced Feistel Network (FN). Weight-Based Representation (WBR) of sub-blocks is employed in estimating the minimum number of s-boxes of these cipher structures. The result shows that EFN Type-II and EFN Type-III have better immunity to differential cryptanalysis than a balanced FN. This is due to a difference cancellation that occurs more often in a balanced FN. 2007 Conference or Workshop Item PeerReviewed Ibrahim, Subariah and Maarof, Mohd. Aizaini and Salihin Ngadiman, Mohd. (2007) Practical security against differential cryptanalysis of extended feistel network. In: Postgraduate Annual Research Seminar (PARS’ 07), 2007, UTM, Johor Bahru. |
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QA75 Electronic computers. Computer science Ibrahim, Subariah Maarof, Mohd. Aizaini Salihin Ngadiman, Mohd. Practical security against differential cryptanalysis of extended feistel network |
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Immunity against differential cryptanalysis is an important measure in designing symmetric ciphers. Practical security is a measure to evaluate this immunity by estimating the minimum number of differential active s-boxes. A cipher with more s-boxes is said to have better immunity against differential cryptanalysis. In this paper, we evaluate the immunity of three types of Extended Feistel Network (EFN) with Substitution-Permutation (SP) round function and compare it with a balanced Feistel Network (FN). Weight-Based Representation (WBR) of sub-blocks is employed in estimating the minimum number of s-boxes of these cipher structures. The result shows that EFN Type-II and EFN Type-III have better immunity to differential cryptanalysis than a balanced FN. This is due to a difference cancellation that occurs more often in a balanced FN. |
format |
Conference or Workshop Item |
author |
Ibrahim, Subariah Maarof, Mohd. Aizaini Salihin Ngadiman, Mohd. |
author_facet |
Ibrahim, Subariah Maarof, Mohd. Aizaini Salihin Ngadiman, Mohd. |
author_sort |
Ibrahim, Subariah |
title |
Practical security against differential cryptanalysis of extended feistel network |
title_short |
Practical security against differential cryptanalysis of extended feistel network |
title_full |
Practical security against differential cryptanalysis of extended feistel network |
title_fullStr |
Practical security against differential cryptanalysis of extended feistel network |
title_full_unstemmed |
Practical security against differential cryptanalysis of extended feistel network |
title_sort |
practical security against differential cryptanalysis of extended feistel network |
publishDate |
2007 |
url |
http://eprints.utm.my/id/eprint/25412/ |
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1643647583529205760 |
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13.160551 |