| Presentation | 2002/3/12 A Study on Strength of CIPHERUNICORN-A against Truncated Differential Attack Hiroki SEKINE, Toshinobu KANEKO, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | CIPHERUNICORN-A proposed by NEC, is a 128bit block cipher having DES type structure. As its F function has a very complex structure including 32bit multiplications,it is hard to calculate its exact Differential Probability. By using an mF function model, which is a simpiyfied verion of F function, they estimate the strength of CIPHERUNICORN-A against Differential attack. The estimation is done under the bases of Truncated Differential Cryptanalysis. We re-evaluate the strength of CIPHERUNICORN-A against Differential attack. We found that the upper bound of maximum Differential Characteristic Probability is 2-70.00 by accurate analysis of Truncated Differential paths, and their mF function model can't be a proof for the security of CIPHERUNICORN-A against Differential attack. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | CIPHERUNICORN-A / Differential Characteristic Probability / mF function / Truncated Differential Cryptanalysis |
| Paper # | ISEC2001-120 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2002/3/12(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 | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Strength of CIPHERUNICORN-A against Truncated Differential Attack |
| Sub Title (in English) | |
| Keyword(1) | CIPHERUNICORN-A |
| Keyword(2) | Differential Characteristic Probability |
| Keyword(3) | mF function |
| Keyword(4) | Truncated Differential Cryptanalysis |
| 1st Author's Name | Hiroki SEKINE |
| 1st Author's Affiliation | Department of Electric Engineering Science University of Tokyo() |
| 2nd Author's Name | Toshinobu KANEKO |
| 2nd Author's Affiliation | Department of Electric Engineering Science University of Tokyo |
| Date | 2002/3/12 |
| Paper # | ISEC2001-120 |
| Volume (vol) | vol.101 |
| Number (no) | 728 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |