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Paper 2008/143

Certificateless Signcryption

M. Barbosa and P. Farshim

Abstract

Certificateless cryptography achieves the best of the two worlds: it inherits from identity-based techniques a solution to the certificate management problem in public-key encryption, whilst removing the secret key escrow functionality inherent to the identity-based setting. Signcryption schemes achieve confidentiality and authentication simultaneously by combining public-key encryption and digital signatures, offering better overall performance and security. In this paper, we introduce the notion of certificateless signcryption and present an efficient construction which guarantees security under insider attacks, and therefore provides forward secrecy and non-repudiation. The scheme is shown to be secure using random oracles under a variant of the bilinear Diffie-Hellman assumption.

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Metadata
Available format(s)
PDF PS
Category
Public-key cryptography
Publication info
Published elsewhere. Third ACM Symposium on Information, Computer and Communications Security (ASIACCS'08)
Keywords
Certificateless CryptogrpahySigncryptionInsider Security.
Contact author(s)
farshim @ cs bris ac uk
History
2008-03-31: received
Short URL
https://ia.cr/2008/143
License
Creative Commons Attribution
CC BY
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