Improved tradeoff between encapsulation and decapsulation of HK09

Authors:
Xianhui Lu;Bao Li;Qixiang Mei;Yamin Liu
Affiliations:
State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, Beijing, China;State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, Beijing, China;School of Information, Guangdong Ocean University, Zhanjiang, China;State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, Beijing, China
Venue:
Inscrypt'11 Proceedings of the 7th international conference on Information Security and Cryptology
Year:
2011

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Abstract

We propose a new variant of HK09 (Proposed by Hofheinz and Kiltz in Eurocrypt2009) which simplifies the decapsulation. Our result is a tradeoff between the efficiency of encapsulation and decapsulation. Compared with original HK09 the efficiency of decapsulation is improved by 38.9% and the efficiency of encapsulation is dropped by 11.4%.