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Certificateless Public Key Encryption in the Selective-ID Security Model (Without Random Oracles)

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Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 4575))

Abstract

The concept of Certificateless Public Key Encryption (CLPKE) eliminates the use of certificates in certified Public Key Encryption (PKE) scheme and the key-escrow problem in Identity Based Encryption (IBE) scheme. Al-Riyami and Paterson first proposed a CL-PKE scheme and proved its security in their security model (AP-model) using idealized random oracles. Several generic constructions were also proposed to construct a CL-PKE scheme by composing the standard PKE and IBE schemes. Recently, it was proved that some generic constructions are not secure against chosen ciphertext attacks in light of the security goals in the AP-model. In this paper, we show that all the known generic constructions are not secure against chosen ciphertext attacks, in the AP-model or a weaker security model than the AP-model. We also propose a CL-PKE scheme which is provably secure against chosen ciphertext attacks without random oracles. Our construction is proven secure in the selective-ID security model, reflecting the feature of CL-PKE scheme.

This research was supported by the MIC(Ministry of Information and Communication), Korea, under the ITRC(Information Technology Research Center) support program supervised by the IITA(Institute of Information Technology Advancement)(IITA-2006-(C1090-0603-0025)).

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Tsuyoshi Takagi Tatsuaki Okamoto Eiji Okamoto Takeshi Okamoto

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Park, J.H., Choi, K.Y., Hwang, J.Y., Lee, D.H. (2007). Certificateless Public Key Encryption in the Selective-ID Security Model (Without Random Oracles). In: Takagi, T., Okamoto, T., Okamoto, E., Okamoto, T. (eds) Pairing-Based Cryptography – Pairing 2007. Pairing 2007. Lecture Notes in Computer Science, vol 4575. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73489-5_5

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  • DOI: https://doi.org/10.1007/978-3-540-73489-5_5

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-73488-8

  • Online ISBN: 978-3-540-73489-5

  • eBook Packages: Computer ScienceComputer Science (R0)

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