Cryptanalysis of the energy efficient stream ciphers SSC2

Authors:
Yunyi Liu;Tuanfa Qin;Wansun Ni;Shuyi Zhang
Affiliations:
State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing, Jiangsu, China;State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing, Jiangsu, China;State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing, Jiangsu, China;State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing, Jiangsu, China
Venue:
MADNES'05 Proceedings of the First international conference on Secure Mobile Ad-hoc Networks and Sensors
Year:
2005

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Abstract

The SSC2 is a fast software stream cipher designed for wireless handsets with limited computational capabilities. It is the only one stream cipher which is special designed aim to energy efficient cryptography for wireless sensor networks in recent years open literatures. In this paper, the improved Guess-and-Determine attacks on both LFSR and lagged-Fibonacci half-ciphers of the SSC2 stream cipher are proposed. And some open problems about designing energy efficient stream cipher are discussed.