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A proxy broadcast re-encryption for cloud data sharing

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Abstract

Proxy re-encryption (PRE) enables a semi-trusted proxy to automatically convert a delegator’s ciphertext to a delegate’s ciphertext without learning anything about the underlying plaintext. PRE schemes have broad applications, such as cloud data sharing systems, distributed file systems, email forward systems and DRM systems. In this paper, we introduced a new notion of proxy broadcast re-encryption (PBRE). In a PBRE scheme, a delegator, Alice, can delegate the decryption right to a set of users at a time, which means that Alice’s ciphertext can be broadcast re-encrypted. We propose a PBRE scheme and prove its security against a chosen-ciphertext attack (CCA) in the random oracle model under the decisional n-BDHE assumption. Furthermore, our scheme is collusion-resistant, which means the proxy cannot collude with a set of delegates to reveal the delegator’s private key.

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Acknowledgments

This paper is supported by the National Natural Science Foundation of China (No. 61672270, 61602216, 6127208, 61300236), the Research Foundation for Humanities and Social Sciences of Ministry of Education, China (No.14YJAZH023,15YJCZH129), the Qing Lan Project for Young Researchers of Jiangsu Province of China(No. KYQ14004),and the Open Fund of State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences (No. 2015-MSB-10), the National Science Foundation for Post-doctoral Scientists of China (No. 2013M530254), the National Science Foundation for Post-doctoral Scientists of Jiangsu (No. 1302137C), and the China Postdoctoral Science special Foundation (No. 2014T70518).

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Authors and Affiliations

  1. College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China

    Maosheng Sun, Liming Fang & Jiandong Wang

  2. Department of Computer Engineering, Jiangsu University of Technology, Changzhou, China

    Chunpeng Ge

  3. Department of Information Center, Yangzhou University, Yangzhou, China

    Maosheng Sun

  4. State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing, China

    Chunpeng Ge

Authors
  1. Maosheng Sun
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  2. Chunpeng Ge
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  3. Liming Fang
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  4. Jiandong Wang
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Correspondence to Chunpeng Ge.

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Sun, M., Ge, C., Fang, L. et al. A proxy broadcast re-encryption for cloud data sharing. Multimed Tools Appl 77, 10455–10469 (2018). https://doi.org/10.1007/s11042-017-4448-9

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  • DOI: https://doi.org/10.1007/s11042-017-4448-9

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