| Presentation | 2005-03-17 A Chosen IV Attack against FMS Attack-Resistant WEP Implementation Toshihiro OHIGASHI, Yoshiaki SHIRAISHI, Masakatu MORII, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | WEP protocol is a security protocol to protect privacy of the wireless LAN communication. Original WEP was broken by the FMS attack in 2001. FMS attack-resistant WEP implementation removes weak IVs to resist the FMS attack. We have already proposed a known IV attack to FMS attack-resistant WEP implementation, and have pointed out that most WEP's IVs become weak IV. When 64-bit session key, the threat of the practical attack for the FMS attack-resistant WEP implementation increases greatly by the known IV attack. When 128-bit session key, the known IV attack recover 104-bit secret key of the FMS attack-resistant WEP implementation within realistically possible computational times. In this paper, we propose more efficient key recovery attack. The proposed attack chooses weak IVs with strong bias from all weak IVs, and is a practical attack for the FMS attack-resistant WEP implementation of 128-bit session key. Therefore, the FMS attack-resistant WEP implementation is insecure. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | wireless LAN / WEP / key recovery attack / weak IV / RC4 |
| Paper # | IT2004-57,ISEC2004-113,WBS2004-172 |
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| Committee | IT |
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| Conference Date | 2005/3/10(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 Theory (IT) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Chosen IV Attack against FMS Attack-Resistant WEP Implementation |
| Sub Title (in English) | |
| Keyword(1) | wireless LAN |
| Keyword(2) | WEP |
| Keyword(3) | key recovery attack |
| Keyword(4) | weak IV |
| Keyword(5) | RC4 |
| 1st Author's Name | Toshihiro OHIGASHI |
| 1st Author's Affiliation | Department of Information Science and Intelligent Systems, The University of Tokushima() |
| 2nd Author's Name | Yoshiaki SHIRAISHI |
| 2nd Author's Affiliation | Department of Informatics, Kinki University |
| 3rd Author's Name | Masakatu MORII |
| 3rd Author's Affiliation | Department of Information Science and Intelligent Systems, The University of Tokushima |
| Date | 2005-03-17 |
| Paper # | IT2004-57,ISEC2004-113,WBS2004-172 |
| Volume (vol) | vol.104 |
| Number (no) | 729 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |