Chosen-Ciphertext secure certificateless proxy re-encryption

Authors:
Chul Sur;Chae Duk Jung;Youngho Park;Kyung Hyune Rhee
Affiliations:
Department of Computer Science, Pukyong National University, Busan, Republic of Korea;Department of Information Security, Pukyong National University;Department of Information Security, Pukyong National University;Department of IT Convergence and Application Engineering, Pukyong National University
Venue:
CMS'10 Proceedings of the 11th IFIP TC 6/TC 11 international conference on Communications and Multimedia Security
Year:
2010

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Abstract

In this paper we introduce the notion of certificateless proxy re-encryption and also give precise definitions for secure certificateless proxy re-encryption schemes. We present a concrete scheme based on bilinear pairing, which enjoys the advantages of certificateless public key cryptography while providing the functionalities of proxy re-encryption. Moreover, the proposed scheme is unidirectional and compatible with current certificateless encryption deployments. Finally, we show that our scheme has chosen ciphertext security in the random oracle model.