| Presentation | 2003/9/12 A Study on Weak Keys of IDEA Kazuya HATAKEYAMA, Yasuo HATANO, Tsoshinobu KANEKO, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Deamen et al. showed that IDEA has 2^<23> weak keys that holds with linear probability 1. To find the weak keys, they used the sub-keys equal to 0 or 1, which have linear probability 1 on the multiplication of IDEA on module 2^<16>+1. On the multiplication, however, we found the sub-keys, 2.3^<15>, 2^<15>+1, and 2^<16>-1 also hold with linear probability 1. We re-evaluate the weak keys of IDEA by using these sub-keys and show that the total number of weak keys increases to twice compared the weak keys shown by Deamen et al. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Block Cipher / IDEA / Weak Keys / Linear Probability |
| Paper # | ISEC2003-57 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2003/9/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Information Security (ISEC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Weak Keys of IDEA |
| Sub Title (in English) | |
| Keyword(1) | Block Cipher |
| Keyword(2) | IDEA |
| Keyword(3) | Weak Keys |
| Keyword(4) | Linear Probability |
| 1st Author's Name | Kazuya HATAKEYAMA |
| 1st Author's Affiliation | Department of Electrical Engineering, Faculty of Science and Technology, Technology, Tokyo University of Science() |
| 2nd Author's Name | Yasuo HATANO |
| 2nd Author's Affiliation | Department of Electrical Engineering, Faculty of Science and Technology, Technology, Tokyo University of Science |
| 3rd Author's Name | Tsoshinobu KANEKO |
| 3rd Author's Affiliation | Department of Electrical Engineering, Faculty of Science and Technology, Technology, Tokyo University of Science |
| Date | 2003/9/12 |
| Paper # | ISEC2003-57 |
| Volume (vol) | vol.103 |
| Number (no) | 315 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |