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On-Line/Off-Line Threshold Proxy Re-Signature Scheme through the Simulation Approach |
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PP: 3251-3261 |
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Author(s) |
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Xiaodong Yang,
Guojuan Gao,
Yanan Li,
Yan Li,
Caifen Wang,
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Abstract |
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| On-line/off-line threshold proxy re-signatures can efficiently improve the the performance of threshold proxy re-signature
schemes. A simulation theorem for on-line/off-line threshold proxy re-signature schemes is presented in this paper. This theorem
provides a theoretical basis for constructing an on-line/off-line threshold proxy re-signature scheme through the simulation approach,
where the security of an on-line/off-line threshold proxy re-signature scheme can be reduced to that of its underlying divisible online/
off-line proxy re-signature scheme. Furthermore, we propose an on-line/off-line threshold proxy re-signature scheme which is
proven secure (unforgeable and robust) under the computational Diffie-Hellman assumption and the discrete logarithm assumption.
The on-line phase of the proposed scheme is efficient: computing a re-signature does not require any heavy computations such as
exponentiations or pairings. |
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