| Presentation | 2002/7/12 An Attack of 6-round MISTY1 without FL functions Hidema TANAKA, Toshinobu KANEKO, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The encryption algorithm MISTY1 is provably secure, when it has 3-round FO functions, against linear cryptanalysis and differential cryptanalysis. We estimated the strength of FO function against higher order differential attack. We found that the value of 7th order differential of part of the output from 3-round FO function is constant, for any key or fixed value of plaintexts. The attack of 6 round MISTY1 without FL functions using this fact is demonstrated. It is attackable using 2^12 chosen plaintexts and times the number of FO function operations. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Block cipher / Provably secure / MISTY1 / Higher order differential attack |
| Paper # | ISEC2002-41 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2002/7/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Information Security (ISEC) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An Attack of 6-round MISTY1 without FL functions |
| Sub Title (in English) | |
| Keyword(1) | Block cipher |
| Keyword(2) | Provably secure |
| Keyword(3) | MISTY1 |
| Keyword(4) | Higher order differential attack |
| 1st Author's Name | Hidema TANAKA |
| 1st Author's Affiliation | Emergency Communications Group, Communications Research Laboratory() |
| 2nd Author's Name | Toshinobu KANEKO |
| 2nd Author's Affiliation | Department of Electrical Engineering, Science University of TOKYO |
| Date | 2002/7/12 |
| Paper # | ISEC2002-41 |
| Volume (vol) | vol.102 |
| Number (no) | 212 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |