Abstract
According to the relation of an attribute set and its subset, the author presents a hierarchical attribute-based encryption scheme in which a secret key is associated with an attribute set. A user can delegate the private key corresponding to any subset of an attribute set while he has the private key corresponding to the attribute set. Moreover, the size of the ciphertext is constant, but the size of private key is linear with the order of the attribute set in the hierarchical attribute-based encryption scheme. Lastly, we can also prove that this encryption scheme meets the security of IND-sSET-CPA in the standard model.
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Foundation item: Supported by the National Natural Science Foundation of China (60903175, 60703048) and the Natural Science Foundation of Hubei Province (2009CBD307, 2008CDB352)
Biography: ZOU Xiubin, male, Lecturer, Ph.D., research direction: public key cryptosystem and its security analysis.
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Zou, X. A hierarchical attribute-based encryption scheme. Wuhan Univ. J. Nat. Sci. 18, 259–264 (2013). https://doi.org/10.1007/s11859-013-0925-9
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DOI: https://doi.org/10.1007/s11859-013-0925-9
Key words
- attribute-based encryption
- hierarchical attribute-based encryption
- identity-based encryption (IBE)
- bilinear map