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Journal of Information Science and Engineering, Vol. 30 No. 4, pp. 1537-1552 (September 2014)


Efficient Certificate-Based Encryption Scheme Secure Against Key Replacement Attacks in the Standard Model*


YANG LU AND JIGUO LI
College of Computer and Information Engineering
Hohai University
Nanjing, 211100 P.R. China

Certificate-based encryption is a useful primitive that combines traditional public key encryption and identity-based encryption while preserving some of their most attractive features. It not only simplifies the cumbersome certificate management in traditional PKI, but also solves the key escrow problem inherent in identity-based encryption. In this paper, we propose a new certificate-based encryption scheme without random oracles that is provably secure against key replacement attacks. The proposed certificate-based encryption scheme is proven to be secure under the hardness of the decision 3-Party Diffie- Hellman problem in the standard model. Performance comparison shows that the proposed scheme outperforms all the previous standard-model certificate-based encryption schemes in the literature.

Keywords: public key encryption, certificate-based encryption, key replacement attack, standard model, 3-DDH problem

Full Text () Retrieve PDF document (201409_14.pdf)

Received October 19, 2012; revised January 22, 2013; accepted February 18, 2013.
Communicated by Vincent Rijmen.
* This work is supported by the National Natural Science Foundation of China (No. 61272542), the Six Talent Peaks Program of Jiangsu Province of China (No. 2009182), the Fundamental Research Funds for the Central Universities of China (No. 2010B06414).