Abstract
“Certificateless Public Key Cryptography” has very appealing features, namely it does not require any public key certification (cf. traditional Public Key Cryptography) nor having key escrow problem (cf. Identity-Based Cryptography). Unfortunately, construction of Certificateless Public Key Encryption (CLPKE) schemes has so far depended on the use of Identity-Based Encryption, which results in the bilinear pairing-based schemes that need costly operations. In this paper, we consider a relaxation of the original model of CLPKE and propose a new CLPKE scheme that does not depend on the bilinear pairings. We prove that in the random oracle model, our scheme meets the strong security requirements of the new model of CLPKE such as security against public key replacement attack and chosen ciphertext attack, assuming that the standard Computational Diffie-Hellman problem is intractable.
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Baek, J., Safavi-Naini, R., Susilo, W. (2005). Certificateless Public Key Encryption Without Pairing. In: Zhou, J., Lopez, J., Deng, R.H., Bao, F. (eds) Information Security. ISC 2005. Lecture Notes in Computer Science, vol 3650. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11556992_10
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DOI: https://doi.org/10.1007/11556992_10
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