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このアイテムの引用には次の識別子を使用してください:
http://hdl.handle.net/10119/16282
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| タイトル: | Refined Construction of RC4 Key Setting in WPA |
| 著者: | Ito, Ryoma
Miyaji, Atsuko |
| キーワード: | RC4
WPA
TKIP
linear correlations
key setting |
| 発行日: | 2017-01-01 |
| 出版者: | 電子情報通信学会 |
| 誌名: | IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences |
| 巻: | E100.A |
| 号: | 1 |
| 開始ページ: | 138 |
| 終了ページ: | 148 |
| DOI: | 10.1587/transfun.E100.A.138 |
| 抄録: | The RC4 stream cipher is widely used including WEP and WPA, which are the security protocols for IEEE 802.11 wireless standard. WPA improved a construction of the RC4 key setting known as TKIP to avoid the known WEP attacks. The first 3-byte RC4 keys generated by IV in WPA are known since IV can be obtained by observing packets. The weaknesses in TKIP using the known IV were reported by Sen Gupta et al. at FSE 2014 and by Ito and Miyaji at FSE 2015. Both showed that TKIP induces many RC4 key correlations including the keystream bytes or the unknown internal states. Ideally TKIP should be constructed in such a way that it can keep the security level of generic RC4. In the first part of this paper, we will provide newly theoretical proofs of 17 correlations remain unproven in our previous work theoretically. Our theoretical analysis can make clear how TKIP induces biases of internal states in generic RC4. In the second part of this paper, we will further provide a refined construction of the RC4 key setting. As a result, we can reduce the number of correlations in the refined construction by about 70% in comparison with that in the original setting. |
| Rights: | Copyright (C)2017 IEICE. Ryoma Ito, Atsuko Miyaji, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, E100.A(1), 2017, 138-148. https://www.ieice.org/jpn/trans_online/ |
| URI: | http://hdl.handle.net/10119/16282 |
| 資料タイプ: | publisher |
| 出現コレクション: | b10-1. 雑誌掲載論文 (Journal Articles)
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このアイテムのファイル:
| ファイル |
記述 |
サイズ | 形式 |
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| E100-A.pdf | | 510Kb | Adobe PDF | 見る/開く |
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