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Enhanced Certificate-Based Encryption Scheme without Bilinear Pairings
  • KSII Transactions on Internet and Information Systems
    Monthly Online Journal (eISSN: 1976-7277)

Enhanced Certificate-Based Encryption Scheme without Bilinear Pairings

Vol. 10, No. 2, February 28, 2016
10.3837/tiis.2016.02.024, Download Paper (Free):

Abstract

Certificate-based cryptography is a useful public key cryptographic primitive that combines the merits of traditional public key cryptography and identity-based cryptography. It not only solves the key escrow problem inherent in identity-based cryptography, but also simplifies the cumbersome certificate management problem in traditional public key cryptography. In this paper, by giving a concrete attack, we first show that the certificate-based encryption scheme without bilinear pairings proposed by Yao et al. does not achieve either the chosen-ciphertext security or the weaker chosen-plaintext security. To overcome the security weakness in Yao et al.’s scheme, we propose an enhanced certificate-based encryption scheme that does not use the bilinear pairings. In the random oracle model, we formally prove it to be chosen-ciphertext secure under the computational Diffie-Hellman assumption. The experimental results show that the proposed scheme enjoys obvious advantage in the computation efficiency compared with the previous certificate-based encryption schemes. Without costly pairing operations, it is suitable to be employed on the computation-limited or power-constrained devices.


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Cite this article

[IEEE Style]
Y. Lu and Q. Zhang, "Enhanced Certificate-Based Encryption Scheme without Bilinear Pairings," KSII Transactions on Internet and Information Systems, vol. 10, no. 2, pp. 881-896, 2016. DOI: 10.3837/tiis.2016.02.024.

[ACM Style]
Yang Lu and Quanling Zhang. 2016. Enhanced Certificate-Based Encryption Scheme without Bilinear Pairings. KSII Transactions on Internet and Information Systems, 10, 2, (2016), 881-896. DOI: 10.3837/tiis.2016.02.024.