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- Eli BihamãYaniv CarmeliãItai DinurãOrr DunkelmanãNathan Kellerãããã³Adi Shamirã2ã€ã®ããŒã䜿çšããå埩Even-Mansourã¹ããŒã ã®æå·è§£æãIACRæå·åePrintã¢ãŒã«ã€ãã2013ïŒ674ã2013ã
- Andrey Bogdanov, Lars R Knudsen, Gregor Leander, Francois-Xavier Standaert, John Steinberger, and Elmar Tischhauser. Key-alternating ciphers in a provable setting: Encryption using a small number of public permutations. In Advances in CryptologyâEUROCRYPT 2012, pages 45â62. Springer, 2012.
- Alex Biryukov and David Wagner. Advanced slide attacks. In Advances in CryptologyâEUROCRYPT 2000, pages 589â606. Springer, 2000.
- Shan Chen, Rodolphe Lampe, Jooyoung Lee, Yannick Seurin, and John Steinberger. Minimizing the two-round Even-Mansour cipher. In Advances in CryptologyâCRYPTO 2014, pages 39â56. Springer, 2014.
- Joan Daemen. Limitations of the Even-Mansour construction. In Advances in CryptologyâASIACRYPT'91, pages 495â498. Springer, 1993.
- Itai Dinur, Orr Dunkelman, Nathan Keller, and Adi Shamir. Key recovery attacks on 3-round Even-Mansour, 8-step LED-128, and full AES2. In Advances in Cryptology-ASIACRYPT 2013, pages 337â356. Springer, 2013.
- Orr Dunkelman, Nathan Keller, and Adi Shamir. Minimalism in cryptography: The Even-Mansour scheme revisited. In Advances in CryptologyâEUROCRYPT 2012, pages 336â354. Springer, 2012.
- [EM97] Shimon Even and Yishay Mansour. A construction of a cipher from a single pseudorandom permutation. Journal of Cryptology, 10(3):151â 161, 1997.
- Shoni Gilboa and Shay Gueron. Balanced permutations even-mansour ciphers. arXiv preprint arXiv:1409.0421, 2014.
- Philip Hawkes and Luke O'Connor. Xor and non-xor differential probabilities. In Advances in CryptologyâEUROCRYPT'99, pages 272â285. Springer, 1999.
- Nicky Mouha and Atul Luykx. Multi-key security: The Even-Mansour construction revisited. Technical report, Cryptology ePrint Archive, Report 2015/101, 2015.
- Ivica Nikolic, Lei Wang, and Shuang Wu. Cryptanalysis of round-reduced LED. In Shiho Moriai, editor, Fast Software Encryption, volume 8424 of Lecture Notes in Computer Science, pages 112â129. Springer Berlin Heidelberg, 2014.
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