Slide attack on standard stream cipher Enocoro-80 in the related-key chosen IV setting

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• 作者：Lin Ding ; ^{dinglin_cipher@163.com" class="auth_mail" title="E-mail the corresponding author} ; Chenhui Jin ^{jinchenhui@126.com" class="auth_mail" title="E-mail the corresponding author} ; Jie Guan ^{guanjie007@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Cryptanalysis ; Lightweight stream cipher ; Enocoro-80 ; Slide property
• 刊名：Pervasive and Mobile Computing
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：24
• 期：Complete
• 页码：224-230
• 全文大小：460 K

文摘

Enocoro-80 is a lightweight stream cipher proposed in 2007. Several attacks on it have been published, although none have violated the claimed 80-bit security of Enocoro-80. The cipher had been adopted as an ISO/IEC29192 standard in 2012. This paper exploits the slide property of Enocoro-80, and shows that it is vulnerable to a related-key chosen IV attack when the key belongs to a large subset of 2⁷²$2^{72}$ of all 2⁸⁰$2^{80}$ keys. This attack has a time complexity of 2⁴⁸$2^{48}$, requiring 2¹⁷$2^{17}$ chosen IVs. This is the first paper pointing out a potential weakness in the Enocoro-80 stream cipher.