Cryptology ePrint Archive: Report 2006/390

Revisit of CS98

Xianhui Lu, Xuejia Lai, Dake He,Guomin Li

Abstract: Cramer and Shoup proposed the first provably secure practical public-key encryption scheme in the standard model (CS98). We find new way to construct the secure reduction in which the decryption oracle is not needed yet. Thus we get a simplified version of CS98 which is more efficient than the original scheme, and also provably secure against chosen ciphertext attack in standard model.

Category / Keywords: PKE, CCA, standard model

Date: received 5 Nov 2006, last revised 21 May 2007, withdrawn 14 Jan 2008

Contact author: lu_xianhui at sohu com

Available format(s): (-- withdrawn --)

Version: 20080115:044242 (All versions of this report)

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