| Presentation | 1993/10/26 Dynamic Swapping Schemes and Differential Cryptanalysis Toshinobu Kaneko, Kenji Koyama, Routo Terada, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We propose a dynamically randomized version of DES(called RDES) in which a probabilistic swapping S_k(X)is added at each round. This new scheme decrease the probability of success in differential cryptanalysis by decreasing the characteristic probability.We analyze each "best" two-round chaxacteristic probab ilities for typical schemes:(i)RDES- 1′ with an optimal one-level swapping,(ii)RDES-2 with a simple two-level swapping,and(iii)RDES- 2′ with an optimal twolevel swapping.The main results are as follo ws.(a)A differential attack for 16 round RDES-1′ and 16 round RDES -2 requires more computational time than the exhaustive search.(b) A differential attack is substantially inapplicable to 16 round RDES-2′ because more than 2^63> chosen plaintext pairs are requir ed.(c)Encryption, decryption speeds of 16-round RDES-1′ and 16 rou nd RDES-2′ are faster or equal to that of the 17-round DES. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | differential Cryptanalysis / Secret Key Cryptosystem / DES / Characteristic Probability / Dynamic Swapping Scheme |
| Paper # | ISEC93-64 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 1993/10/26(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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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) | Dynamic Swapping Schemes and Differential Cryptanalysis |
| Sub Title (in English) | |
| Keyword(1) | differential Cryptanalysis |
| Keyword(2) | Secret Key Cryptosystem |
| Keyword(3) | DES |
| Keyword(4) | Characteristic Probability |
| Keyword(5) | Dynamic Swapping Scheme |
| 1st Author's Name | Toshinobu Kaneko |
| 1st Author's Affiliation | Science University of Tokyo() |
| 2nd Author's Name | Kenji Koyama |
| 2nd Author's Affiliation | NTT Communication Science Laboratories |
| 3rd Author's Name | Routo Terada |
| 3rd Author's Affiliation | University of Sao Paulo |
| Date | 1993/10/26 |
| Paper # | ISEC93-64 |
| Volume (vol) | vol.93 |
| Number (no) | 296 |
| Page | pp.pp.- |
| #Pages | 10 |
| Date of Issue | |