Generalization and Extension of XEX^* Mode

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概要

• 論文の詳細を見る

• This paper describes an extension of XEX* mode, which is a method to convert a block cipher into a tagged tweakable block cipher, a notion introduced by Rogaway in 2004 as an extension of the tweakable block cipher by Liskov et al. Our extension attaches an additional encryption function to the original XEX*, which has some limitation but is slightly faster than the encryption implemented by XEX*. We prove our schemes security in a general form, where the offset function, a key component of our construction, is not restricted to the one used by XEX*. We also provide some applications of our result, in particular to OCB 2.0, an authenticated encryption based on XEX*.

• （社）電子情報通信学会の論文
• 2009-02-01

著者

• MINEMATSU Kazuhiko

  NEC Common Platform Software Research Labs.

• MATSUSHIMA Toshiyasu

  Science & Engineering, Waseda University

• Matsushima Toshiyasu

  Science & Engineering Waseda University

関連論文

• Generalization and Extension of XEX* Mode
• Improved MACs from Differentially-Uniform Permutations(Information Security)
• Generalization and Extension of XEX^* Mode

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