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Paper 2004/150

An Authenticated Certificateless Public Key Encryption Scheme

Young-Ran Lee and Hyang-Sook Lee

Abstract

In 2003, Al-Riyami and Paterson \cite{AP} proposed the certificateless public key cryptography(CL-PKC) which is intermediate between traditional certificated PKC and identity-based PKC. In this paper, we propose an authenticated certificateless public key encryption scheme. Our result improves their public key encryption scheme in efficiency and security. The security of the protocol is based on the hardness of two problems; the computational Diffie-Hellman problem(CDHP) and the bilinear Diffie-Hellman problem(BDHP). We also give a formal security model for both confidentiality and unforgeability, and then show that our scheme is provably secure in the random oracle model.

Metadata
Available format(s)
PDF PS
Publication info
Published elsewhere. Unknown where it was published
Keywords
certificateless public key encryptionconfidentialityunforgeability
Contact author(s)
hsl @ ewha ac kr
sens1990 @ yahoo co kr
History
2004-08-07: last of 2 revisions
2004-07-07: received
See all versions
Short URL
https://ia.cr/2004/150
License
Creative Commons Attribution
CC BY
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