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We propose a novel scheme for selective distribution of content, encoded as documents, that preserves the privacy of the users to whom the documents are delivered and is based on an efficient and novel group key management scheme. Our document broadcasting approach is based on access control policies specifying which users can access which documents, or subdocuments. Based on such policies, a broadcast...
In this paper, we present FENCE framework that addresses the problem of continuous access control enforcement in dynamic data stream environments. The distinguishing characteristics of FENCE include: (1) the stream-centric approach to security, (2) the symmetric modeling of security for both continuous queries and streaming data, and (3) security-aware query processing that considers both regular...
As the use of peer-to-peer (P2P) services for distributed file sharing has grown, the need for fine-grained access control (FGAC) has emerged. Existing access control frameworks use an all-or-nothing approach that is inadequate for sensitive content that may be shared by multiple users. In this paper, we propose a FGAC mechanism based on selective encryption techniques. Using this approach, the owner...
Various mechanisms for authentication and access control have been developed over time. Operating systems and DBMS implement such mechanisms and support quite rich access control models. A major limitation, however, of such mechanisms is that they are not extensible; thus whenever an application domain requires more sophisticated access controls or authentication, the applications must include logics...
The development of adequate security solutions and in particular of authentication and authorization techniques for grid computing systems is a challenging task. Challenges arise from the heterogeneity of users, the presence of multiple security administration entities, the heterogeneity of security techniques used at the various grid hosts, the scalability requirements, and the need for high-level...
Various mechanisms for authentication and access control have been developed over time. Operating systems and DBMS implement such mechanisms and support quite rich access control models. A major limitation, however, of such mechanisms is that they are not extensible; thus whenever an application domain requires more sophisticated access controls or authentication, the applications must include logics...
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