TIIS (Çѱ¹ÀÎÅͳÝÁ¤º¸ÇÐȸ)
ÇѱÛÁ¦¸ñ(Korean Title) |
Enhanced Certificate-Based Encryption Scheme without Bilinear Pairings |
¿µ¹®Á¦¸ñ(English Title) |
Enhanced Certificate-Based Encryption Scheme without Bilinear Pairings |
ÀúÀÚ(Author) |
Yang Lu
Quanling Zhang
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¿ø¹®¼ö·Ïó(Citation) |
VOL 10 NO. 02 PP. 0881 ~ 0896 (2016. 02) |
Çѱ۳»¿ë (Korean Abstract) |
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¿µ¹®³»¿ë (English 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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Å°¿öµå(Keyword) |
Certificate-based cryptography
encryption
bilinear pairing
chosen-ciphertext security
random oracle model
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PDF ´Ù¿î·Îµå
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