| Presentation | 2007-07-20 On Construction of Block Cipher with Variable Security Parameter Yasumasa HIRAI, Shin'ichiro MATSUO, Wakaha OGATA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Currently, cryptographical technology such as an encryption algorithm is used in many IT systems. When an encryption scheme becomes insecure in computational sense, to fill the security requirement, we need to replace all IT systems which use the algorithm. Considering the cost, however, the replacement of IT systems outside the schedule is very difficult. In this research, we introduce the variable key length and the variable block size as "security parameters" of the block cipher, and show some examples of block ciphers with security parameters. By using such block ciphers, we can easily enhance the security of IT systems without exchanging the algorithm, even if the block cipher becomes computationally insecure. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | system security / n times encryption / block cipher / algorithm compromise |
| Paper # | ISEC2007-48 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2007/7/13(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| 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) | On Construction of Block Cipher with Variable Security Parameter |
| Sub Title (in English) | |
| Keyword(1) | system security |
| Keyword(2) | n times encryption |
| Keyword(3) | block cipher |
| Keyword(4) | algorithm compromise |
| 1st Author's Name | Yasumasa HIRAI |
| 1st Author's Affiliation | NTT DATA Corporation() |
| 2nd Author's Name | Shin'ichiro MATSUO |
| 2nd Author's Affiliation | NTT DATA Corporation |
| 3rd Author's Name | Wakaha OGATA |
| 3rd Author's Affiliation | Tokyo Institute of Technology |
| Date | 2007-07-20 |
| Paper # | ISEC2007-48 |
| Volume (vol) | vol.107 |
| Number (no) | 141 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |