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access icon free Chosen-plaintext linear attacks on Serpent

In this study, the authors consider chosen-plaintext variants of the linear attack on reduced round Serpent. By reasonably fixing parts of the plaintexts of 10-round Serpent the number of texts required in a linear attack with single approximation can be significantly reduced by a factor of 222. The authors also give the best data complexity on 10-round Serpent so far, which is 280. Moreover, the authors extend the chosen-plaintext technique to the linear attack using multiple approximations and improve the results of cryptanalysis in data complexity or/and time complexity in different scenarios. As an application to show the usefulness of this technique, an experiment in the multidimensional linear model on 5-round Serpent is given.

http://iet.metastore.ingenta.com/content/journals/10.1049/iet-ifs.2012.0287
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content/journals/10.1049/iet-ifs.2012.0287
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