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Restricted CCA-secure bidirectional proxy re-encryption scheme

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4 Author(s)
Duntao Guo ; Key Lab. of Inf. & Network Security, Eng. Coll. of Chinese Armed Police Force, Xi''an, China ; Xu An Wang ; Minqing Zhang ; Xiaoyuan Yang

Proxy re-encryption allows a proxy to transform a ciphertext computed under Alice's public key into one that can be opened under Bob's decryption key. In CANS'08, Deng et al. proposed the first bidirectional IND-PRE-CCA2 secure proxy re-encryption without parings. Later, in PKC'09, Shao et al. proposed the first unidirectional IND-PRE-CCA2 secure proxy re-encryption without parings. But both of these schemes prove their security in the random oracle. They left an open problem of constructing (bidirectional or unidirectional) IND-PRE-CCA2 secure proxy re-encryption scheme in the standard model yet without pairings. In this paper, we try to solve this open problem by proposing two new restricted IND-PRE-CCA2 secure bidirectional proxy re-encryption schemes without pairing nor random oracle.

Published in:

Computer Science and Information Technology (ICCSIT), 2010 3rd IEEE International Conference on  (Volume:5 )

Date of Conference:

9-11 July 2010

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