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- Title
Certificate-Based Encryption Scheme without Pairing.
- Authors
Ji Yao; Jiguo Li; Yichen Zhang
- Abstract
Certificate-based cryptography is a new cryptographic primitive which eliminates the necessity of certificates in the traditional public key cryptography and simultaneously overcomes the inherent key escrow problem suffered in identity-based cryptography. However, to the best of our knowledge, all existed constructions of certificate-based encryption so far have to be based on the bilinear pairings. The pairing calculation is perceived to be expensive compared with normal operations such as modular exponentiations in finite fields. The costly pairing computation prevents it from wide application, especially for the computation limited wireless sensor networks. In order to improve efficiency, we propose a new certificate-based encryption scheme that does not depend on the pairing computation. Based on the decision Diffie-Hellman problem assumption, the scheme's security is proved to be against the chosen ciphertext attack in the random oracle. Performance comparisons show that our scheme outperforms the existing schemes.
- Subjects
DATA encryption; CRYPTOGRAPHY; ESCROWS; WIRELESS communications; FINITE fields; COMPUTER security
- Publication
KSII Transactions on Internet & Information Systems, 2013, Vol 7, Issue 6, p1480
- ISSN
1976-7277
- Publication type
Article
- DOI
10.3837/tiis.2013.06.008