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Title:
Related-key Impossible Differential Analysis of Full Khudra
Authors: Qianqian Yang, Lei Hu, Siwei Sun, Ling Song
Abstract:Khudra is a 18-round lightweight block cipher proposed by Souvik Kolay and Debdeep Mukhopadhyay in the SPACE 2014 conference which is applicable to Field Programmable Gate Arrays (FPGAs). In this paper, we obtain 2^{16} 14-round related-key impossible differentials of Khudra, and based on these related-key impossible differentials for 32 related keys, we launch an attack on the full Khudra with data complexity of 2^{63} related-key chosen-plaintexts, time complexity of about 2^{68.46} encryptions and memory complexity of 2^{64}.
ePrint: https://eprint.iacr.org/2015/840
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