Preserving confidentiality of security policies in data outsourcing

@inproceedings{Vimercati2008PreservingCO,
  title={Preserving confidentiality of security policies in data outsourcing},
  author={Sabrina De Capitani di Vimercati and Sara Foresti and Sushil Jajodia and Stefano Paraboschi and Gerardo Pelosi and Pierangela Samarati},
  booktitle={WPES},
  year={2008}
}
Recent approaches for protecting information in data outsourcing scenarios exploit the combined use of access control and cryptography. In this context, the number of keys to be distributed and managed by users can be maintained limited by using a public catalog of tokens that allow key derivation along a hierarchy. However, the public token catalog, by expressing the key derivation relationships, may leak information on the security policies (authorizations) enforced by the system, which the… CONTINUE READING
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