Privacy Preserving Policy-Based Content Sharing in Public Clouds

  title={Privacy Preserving Policy-Based Content Sharing in Public Clouds},
  author={Mohamed Nabeel and Ning Shang and Elisa Bertino},
  journal={IEEE Transactions on Knowledge and Data Engineering},
An important problem in public clouds is how to selectively share documents based on fine-grained attribute-based access control policies (acps). An approach is to encrypt documents satisfying different policies with different keys using a public key cryptosystem such as attribute-based encryption, and/or proxy re-encryption. However, such an approach has some weaknesses: it cannot efficiently handle adding/revoking users or identity attributes, and policy changes; it requires to keep multiple… CONTINUE READING
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