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Identity Based Proxy Re-Signature Schemes without Random Oracle

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3 Author(s)
Xiaoming Hu ; Sch. of Comput. & Inf., Shanghai Second Polytech. Univ., Shanghai, China ; Zhe Zhang ; Yinchun Yang

Based on Gentry' s identity based encryption, an identity based proxy re-signature scheme is proposed that is existentially unforgeable in the standard model under the q-SDH (Strong Diffie-Hellman) assumption. Comparison with all previous proxy re-signature schemes, the proposed scheme has a tight security reduction and very compact public parameters. It is also very efficient and practical.

Published in:

Computational Intelligence and Security, 2009. CIS '09. International Conference on  (Volume:2 )

Date of Conference:

11-14 Dec. 2009