| Presentation | 2002/7/12 Risks for Raw-key Masking : the Security of 2-key XCBC MAC-generation scheme Soichi FURUYA, Kouichi SAKURAI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Two-key XCBC proposed by Moriai and Imai is a CBCMAC-based method to generate a message authentication code. This method is optimal from several aspects, the number of PRP invocations, key setups, and key materials. This mode is alsp proven the security as a MAC. In this paper, we discuss how masking a secret key for a plaintext block effects to its security. Concerning that the PRP is limited to the special permutations, we show the two-key XCBC is forgeable if one uses Even-Mansour constructions. In case of using DESX construction for two-key XCBC, the necessary complexity to attack the scheme is below that what is proven for DESX. We also study the security of AES and Camellia when they are used in two-key XCBC mode from another aspect, rather than the context of the provable security. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Block cipher / mode of operation / provable security / XCBC / AES |
| Paper # | ISEC2002-40 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2002/7/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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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) | Risks for Raw-key Masking : the Security of 2-key XCBC MAC-generation scheme |
| Sub Title (in English) | |
| Keyword(1) | Block cipher |
| Keyword(2) | mode of operation |
| Keyword(3) | provable security |
| Keyword(4) | XCBC |
| Keyword(5) | AES |
| 1st Author's Name | Soichi FURUYA |
| 1st Author's Affiliation | Hitachi, Systems Development Laboratory() |
| 2nd Author's Name | Kouichi SAKURAI |
| 2nd Author's Affiliation | Dept. of OSCE., Kyushu University |
| Date | 2002/7/12 |
| Paper # | ISEC2002-40 |
| Volume (vol) | vol.102 |
| Number (no) | 212 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |