| Presentation | 2007-05-18 On Onewayness of Key-Scheduling Algorithms for eSTREAM's Ciphers Yoshiaki FUJIKAWA, Toshihiro OHIGASHI, Hidenori KUWAKADO, Masakatu MORII, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In the stream cipher, the initial state is generated from a secret key and an initialization vector (IV) in key-scheduling algorithm (KSA). In order to provide hight-level security, onewayness of the KSA is requested. The ECRYPT Stream Cipher Project (eSTREAM), which selects next generation's stream ciphers, is being encouraged now, and many stream ciphers have been proposed. In this paper, we analyze onewayness of the KSA for several eSTREAM's ciphers. As a result, we show that the KSAs of Dragon, Grain-128(Grain-1.0), HC-256(HC-128) and Trivium are not oneway and the secret key can be recovered easily from the initial state. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | stream cipher / eSTREAM / key-scheduling algorithm / onewayness |
| Paper # | ISEC2007-14 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2007/5/11(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) | On Onewayness of Key-Scheduling Algorithms for eSTREAM's Ciphers |
| Sub Title (in English) | |
| Keyword(1) | stream cipher |
| Keyword(2) | eSTREAM |
| Keyword(3) | key-scheduling algorithm |
| Keyword(4) | onewayness |
| 1st Author's Name | Yoshiaki FUJIKAWA |
| 1st Author's Affiliation | Graduate School of Science and Technology, Kobe University() |
| 2nd Author's Name | Toshihiro OHIGASHI |
| 2nd Author's Affiliation | Graduate School of Science and Technology, Kobe University |
| 3rd Author's Name | Hidenori KUWAKADO |
| 3rd Author's Affiliation | Graduate School of Engineering, Kobe University |
| 4th Author's Name | Masakatu MORII |
| 4th Author's Affiliation | Graduate School of Engineering, Kobe University |
| Date | 2007-05-18 |
| Paper # | ISEC2007-14 |
| Volume (vol) | vol.107 |
| Number (no) | 44 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |