【摘 要】
：
Dear editor,rnK2 is a secure and high-performance stream cipher and has been standardized by ISO/IEC 18033-4.The MASHA stream cipher is a successor of K2 with integrated MAC functionality proposed in 2011.Based on optimizing the guess and determination pr
【机 构】
：
Department of Computer Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Z
论文部分内容阅读
Dear editor,rnK2 is a secure and high-performance stream cipher and has been standardized by ISO/IEC 18033-4.The MASHA stream cipher is a successor of K2 with integrated MAC functionality proposed in 2011.Based on optimizing the guess and determination process,we present an improved Guess and Determine attack on MASHA with time com-plexity of 2224,reducing the time complexity of the existing attack by a factor of 296.To the best of our knowledge,this is the best attack on MASHA so far.
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