| Presentation | 2012-09-21 Differential cryptanalysis of CIPHERUNICORN-A Tomoyasu SUZAKI, Takeshi KAWABATA, Hiroyasu KUBO, Teruo SAITO, Maki SHIGERI, Yukiyasu TSUNOO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper reports a security of the 128-bit block cipher CIPHERUNICORN-A against differentialcryptanalysis. An upper bound of the maximum differential characteristic probability of the CIPHERUNICORN-Awas reported at SCIS 2012. However, the authors omitted to evaluate the differential paths of the A3 function and omitted to calculate the probability of multiplications exhaustively, because of the high complexity. On the other hand, another evaluation result was reported at SCIS 2003. The paper calculated an upper bound of the differential probability regarding the limited differential paths having a few active Tr, functions. The paper also calculated the differential probability of the F function by multiplying by the probability of the main stream (MS) part and the probability of the temporary key generation (TKG) part. However, it was not confirmed whether there are the actual differential paths which the MS part and the TKG part are connected. This paper confirms that there are the actual differential paths described above. This paper also reports the result that the upper bound of the maximum differential probability of the 11-round CIPHERUNICORN-A is less than 2^-128. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Block Cipher / CIPHERUNICORN-A / Differential Cryptanalysis / CRYPTREC |
| Paper # | ISEC2012-46 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2012/9/14(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) | Differential cryptanalysis of CIPHERUNICORN-A |
| Sub Title (in English) | |
| Keyword(1) | Block Cipher |
| Keyword(2) | CIPHERUNICORN-A |
| Keyword(3) | Differential Cryptanalysis |
| Keyword(4) | CRYPTREC |
| 1st Author's Name | Tomoyasu SUZAKI |
| 1st Author's Affiliation | NEC Corporation() |
| 2nd Author's Name | Takeshi KAWABATA |
| 2nd Author's Affiliation | NEC Software Hokuriku, Ltd. |
| 3rd Author's Name | Hiroyasu KUBO |
| 3rd Author's Affiliation | NEC Software Hokuriku, Ltd. |
| 4th Author's Name | Teruo SAITO |
| 4th Author's Affiliation | NEC Software Hokuriku, Ltd. |
| 5th Author's Name | Maki SHIGERI |
| 5th Author's Affiliation | NEC Software Hokuriku, Ltd. |
| 6th Author's Name | Yukiyasu TSUNOO |
| 6th Author's Affiliation | NEC Corporation |
| Date | 2012-09-21 |
| Paper # | ISEC2012-46 |
| Volume (vol) | vol.112 |
| Number (no) | 211 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |