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SIGMOD
2004
ACM

Extending Query Rewriting Techniques for Fine-Grained Access Control

12 years 2 days ago
Extending Query Rewriting Techniques for Fine-Grained Access Control
Current day database applications, with large numbers of users, require fine-grained access control mechanisms, at the level of individual tuples, not just entire relations/views, to control which parts of the data can be accessed by each user. Fine-grained access control is often enforced in the application code, which has numerous drawbacks; these can be avoided by specifying/enforcing access control at the database level. We present a novel fine-grained access control model based on authorization views that allows "authorizationtransparent" querying; that is, user queries can be phrased in terms of the database relations, and are valid if they can be answered using only the information contained in these authorization views. We extend earlier work on authorization-transparent querying by introducing a new notion of validity, conditional validity. We give a powerful set of inference rules to check for query validity. We demonstrate the practicality of our techniques by des...
Shariq Rizvi, Alberto O. Mendelzon, S. Sudarshan,
Added 08 Dec 2009
Updated 08 Dec 2009
Type Conference
Year 2004
Where SIGMOD
Authors Shariq Rizvi, Alberto O. Mendelzon, S. Sudarshan, Prasan Roy
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