Cryptology ePrint Archive: Report 2010/172

Chosen Ciphertext Secure Encryption over Semi-smooth Subgroup

Qixiang Mei, Bao Li,Xianhui Lu and Dingding Jia

Abstract: In this paper we propose two public key encryption schemes over the semi-smooth subgroup introduced by Groth05. Both the schemes are proved secure against chosen ciphertext attacks under the factoring assumption. Since the domain of exponents is much smaller, both our schemes are significantly more efficient than Hofheiz-Kiltz 2009 encryption.

Category / Keywords: public-key cryptography /

Date: received 31 Mar 2010, last revised 3 Apr 2010

Contact author: nupfster at gmail com or nupf@163 com

Available format(s): Postscript (PS) | Compressed Postscript (PS.GZ) | BibTeX Citation

Version: 20100404:015248 (All versions of this report)

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