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| Title | Generalization and Extension of XEX* Mode (in Japanese) |
|---|---|
| Authors | Kazuhiko Minematsu 、Toshiyasu Matsushima |
| Released Year | 2008 |
| Format | Journal |
| Category | Information security |
| Jounal Name | IEICE Trans. Fundamentals |
| Jounal Page | vol.E92-A, no.2, pp.517-524 |
| Published Year | 2009 |
| Published Month | 2 |
| Abstract （English） |
This paper describes an extension of $\XEX$ mode proposed by Rogaway in 2004, which is a method to convert a block cipher, such as AES, into a tweakable block cipher, where encryptions of a tweakable block cipher require an additional public parameter called tweak. Our extension attaches an optional encryption function to the original $\XEX$ without degradation in efficiency and security. This function has some limitation but is slightly faster than the basic encryption by $\XEX$. We prove our scheme's 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 various applications of our result. |
| Note （English） |
3 |
| Manuscript | |
| Presentation |
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