Abstract
In this paper, we propose a new attribute-based proxy re-encryption scheme, where a semi-trusted proxy, with some additional information, can transform a ciphertext under a set of attributes into a new ciphertext under another set of attributes on the same message, but not vice versa, furthermore, its security was proved in the standard model based on decisional bilinear Diffie-Hellman assumption. This scheme can be used to realize fine-grained selectively sharing of encrypted data, but the general proxy re-encryption scheme severely can not do it, so the proposed scheme can be thought as an improvement of general traditional proxy re-encryption scheme.
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Foundation item: Supported by the Natural Science Foundation of Shandong Province (Y2007G37) and the Science and Technology Development Program of Shandong Province (2007GG10001012)
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Guo, S., Zeng, Y., Wei, J. et al. Attribute-based re-encryption scheme in the standard model. Wuhan Univ. J. Nat. Sci. 13, 621–625 (2008). https://doi.org/10.1007/s11859-008-0522-5
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DOI: https://doi.org/10.1007/s11859-008-0522-5