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A Novel Hybrid Encryption Scheme against Adaptive Chosen Ciphertext Attack

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4 Author(s)
Zhifeng Qi ; Beijing Univ. of Posts & Telecommun., Beijing ; Sihan Qing ; Yixian Yang ; Guanghui Cheng

Many efficient CCA2-secure hybrid encryption schemes have been proposed, but their securities are based on too strong assumptions. It would be preferable to base a security proof on a weaker assumption, so we describe a practical hybrid encryption scheme based on the weaker LDDH assumption, and in the standard model prove to be CCA2-secure if the LDDH assumption is true.

Published in:

Computational Intelligence and Security Workshops, 2007. CISW 2007. International Conference on

Date of Conference:

15-19 Dec. 2007

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