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Improved Efficiency of Chosen Ciphertext Secure Encryption from Factoring

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Information Security Practice and Experience (ISPEC 2012)

Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 7232))

Abstract

We propose a new variant of HK09 (proposed by Hofheinz and Kiltz in Eurocrypt 2009) which improves the decapsulation efficiency at the price of a slightly increased key size. Compared with the original HK09 scheme the decapsulation efficiency is improved by 32% (instantiated over the quadratic residuosity group) or 57.6% (instantiated over the semi-smooth subgroup) and the encapsulation efficiency remains the same.

Supported by the National Natural Science Foundation of China (No.61070171), the National Basic Research Program of China(973 project) (No.2007CB311201) and the Postdoctoral Science Foundation of China (No.20100480514).

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Author information

Authors and Affiliations

  1. State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, Beijing, 100049, China

    Xianhui Lu, Bao Li & Yamin Liu

  2. School of Information, Guangdong Ocean University, Zhanjiang, 524088, China

    Qixiang Mei

Authors
  1. Xianhui Lu
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  2. Bao Li
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  3. Qixiang Mei
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  4. Yamin Liu
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Editor information

Editors and Affiliations

  1. School of Computer Science, University of Birmingham, UK

    Mark D. Ryan

  2. Toshiba Corporation, 1, Komukai-Toshiba–Cho, 212-8582, Saiwai-ku, Kawasaki, Japan

    Ben Smyth

  3. School of Computer Science & Software Engineering, University of Wollongong, Northfields Avenue, 2522, Wollongong, NSW, Australia

    Guilin Wang

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Lu, X., Li, B., Mei, Q., Liu, Y. (2012). Improved Efficiency of Chosen Ciphertext Secure Encryption from Factoring. In: Ryan, M.D., Smyth, B., Wang, G. (eds) Information Security Practice and Experience. ISPEC 2012. Lecture Notes in Computer Science, vol 7232. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-29101-2_3

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  • DOI: https://doi.org/10.1007/978-3-642-29101-2_3

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-29100-5

  • Online ISBN: 978-3-642-29101-2

  • eBook Packages: Computer ScienceComputer Science (R0)

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