Cryptology ePrint Archive: Report 2007/361

Proxy Re-encryption Systems for Identity-based Encryption

Toshihiko Matsuo

Abstract: A proxy re-encryption system allows the proxy to transform ciphertexts encrypted under Alice's public key into the different ciphertexts that can be decrypted by Bob's secret key. In this paper, we propose new proxy re-encryption systems; one for the transformation from ciphertexts encrypted under a traditional certificate-based public key into the ciphertexts that can be decrypted by an secret key for Identity-Based Encryption, and the other one for the transformation from ciphertexts encrypted in IBE manner into the different ciphertexts that can be decrypted by the other secret key for the IBE.

Category / Keywords: public-key cryptography / ID-based encryption, proxy re-encryption

Publication Info: In Proceedings of Pairing-Based Cryptography - Pairing 2007, Lecture Notes in Computer Science, LNCS 4575, pages 247-267. Springer-Verlag, 2007.

Date: received 12 Sep 2007

Contact author: matsuotsh at nttdata co jp

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Version: 20070927:160138 (All versions of this report)

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