| Presentation | 2001/5/10 A Study on Strength of Camellia against Higher Order Differential Attack Takeshi KAWABATA, Yasuhiro OHGAKI, 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 Camellia is a block cipher proposed by NIT and Mitsubishi. The Higher Order Differential Attack is the attacking method which applies the higher order differentials to the nonlinear function of block cipher on GF(2)^n . We have shown the 1st order differential attack for F2 with appropriately choosing plaintext. In this paper, the technique is expanded to the eighth order differential and it is applied to Camellia without FL and FL^<-1>. For 6-rounds modified Camellia, we can attack with 2^<12> plaintext and 2^<22>F function operation. The experiment shows that the cpu-time for the attack is around 10 minutes by using Pentium III 500MHz. If n-round elimination attack is used, we can attack 10-rounds modified Camellia with less cpu-time than brute force search of the entire key space 2^<256>. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Camellia / higher order differential attack |
| Paper # | ISEC2001-9 |
| Date of Issue |
| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2001/5/10(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 Camellia against Higher Order Differential Attack |
| Sub Title (in English) | |
| Keyword(1) | Camellia |
| Keyword(2) | higher order differential attack |
| 1st Author's Name | Takeshi KAWABATA |
| 1st Author's Affiliation | Department of Electrical Engineering, Science University of TOKYO() |
| 2nd Author's Name | Yasuhiro OHGAKI |
| 2nd Author's Affiliation | Department of Electrical Engineering, Science University of TOKYO |
| 3rd Author's Name | Toshinobu KANEKO |
| 3rd Author's Affiliation | Department of Electrical Engineering, Science University of TOKYO |
| Date | 2001/5/10 |
| Paper # | ISEC2001-9 |
| Volume (vol) | vol.101 |
| Number (no) | 47 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |