A CCA-secure key-policy attribute-based proxy re-encryption in the adaptive corruption model for dropbox data sharing system |
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| Authors: | Chunpeng Ge Willy Susilo Liming Fang Jiandong Wang Yunqing Shi |
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| Institution: | 1.Department of Computer Engineering,Jiangsu University of Technology,Zhenjiang,China;2.State Key Laboratory of Information Security, Institute of Information Engineering,Chinese Academy of Sciences,Beijing,China;3.School of Computing and Information Technology, Institute of Cybersecurity and Cryptology,University of Wollongong,Wollongong,Australia;4.College of Computer Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,China;5.Department of Electrical and Computer Engineering,New Jersey Institute of Technology,New Jersey,USA |
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| Abstract: | The notion of attribute-based proxy re-encryption extends the traditional proxy re-encryption to the attribute-based setting. In an attribute-based proxy re-encryption scheme, the proxy can convert a ciphertext under one access policy to another ciphertext under a new access policy without revealing the underlying plaintext. Attribute-based proxy re-encryption has been widely used in many applications, such as personal health record and cloud data sharing systems. In this work, we propose the notion of key-policy attribute-based proxy re-encryption, which supports any monotonic access structures on users’ keys. Furthermore, our scheme is proved against chosen-ciphertext attack secure in the adaptive model. |
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