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As a more flexible and effective access control mechanism in databases, fine-grained access control (FGAC) has drawn considerable attention from industrial and research community. While providing more effective protection for databases, FGAC also incurs new loopholes for attacks. When FGAC policies are defined inconsistently, performing UPDATE/DELETE operations might cause information inference, called...
Data recovery for malicious committed transactions after attacks increasingly becomes an important issue. Damage assessment for data recovery requires a transaction log which record data items read or written by all malicious and benign transactions. Unfortunately, conventional undo/redo log could not record read operations for transactions; and existing auditing mechanisms in DBMS could not capture...
The fine-grained access control (FGAC) is important to Web applications. However, it can be circumvented by indirect access such as inferring sensitive data from insensitive data. In the previous FGAC studies, the inference information leakage is not well controlled. In addition, the soundness property, which requires that the results of a query under the FGAC should be the subset of the results of...
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