NDLI: QFilter: fine-grained run-time XML access control via NFA-based query rewriting

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QFilter: fine-grained run-time XML access control via NFA-based query rewriting

Content Provider	ACM Digital Library
Author	Lee, Wang-Chien Liu, Peng Lee, Dongwon Luo, Bo
Abstract	At present, most of the state-of-the-art solutions for XML access controls are either (1) document-level access control techniques that are too limited to support fine-grained security enforcement; (2) view-based approaches that are often expensive to create and maintain; or (3) impractical proposals that require substantial security-related support from underlying XML databases. In this paper, we take a different approach that assumes no security support from underlying XML databases and examine three alternative fine-grained XML access control solutions, namely primitive, pre-processing and post-processing approaches. In particular, we advocate a pre-processing method called QFilter that uses Non-deterministic Finite Automata (NFA) to rewrite user's query such that any parts violating access control rules are pruned. We show the construction and execution of a QFilter and demonstrate its superiority to other competing methods.
Starting Page	543
Ending Page	552
Page Count	10
File Format	PDF
ISBN	1581138741
DOI	10.1145/1031171.1031273
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2004-11-13
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Data security and privacy Xml security Query rewriting
Content Type	Text
Resource Type	Article

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