| Presentation | 2005-12-16 Security of Cryptosystem using Variable Cipher Function Eiji FUKUTOMI, Masahiro FUKUMOTO, Akihiro SHIMIZU, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | To realize high tolerance against correlation attacks, some method changing cipher function by key parameter of common key cryptosystems are proposed. However, depending on key parameter choices may lead to be discovered or narrow down cipher functions. In this paper, we proposed a method of operating algorithm-variable-cryptosystem in secure with a focus on key parameter choices and demonstrate a concrete example of narrow down cipher functions using few known-plaintext and ciphertext with a high probability. Then, renew methods of key parameter considered vulnerability issue are presented. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Common key cryptosystem / Evaluation / FEAL |
| Paper # | ISEC2005-117 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2005/12/9(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) | Security of Cryptosystem using Variable Cipher Function |
| Sub Title (in English) | |
| Keyword(1) | Common key cryptosystem |
| Keyword(2) | Evaluation |
| Keyword(3) | FEAL |
| 1st Author's Name | Eiji FUKUTOMI |
| 1st Author's Affiliation | Department of Engineering, Graduate School of Engineering, Kochi University of Technology() |
| 2nd Author's Name | Masahiro FUKUMOTO |
| 2nd Author's Affiliation | Department of Information Systems Engineering, Kochi University of Technology |
| 3rd Author's Name | Akihiro SHIMIZU |
| 3rd Author's Affiliation | Department of Information Systems Engineering, Kochi University of Technology |
| Date | 2005-12-16 |
| Paper # | ISEC2005-117 |
| Volume (vol) | vol.105 |
| Number (no) | 484 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |