This paper presents an overview of our work in creating a practical database intrusion detection system. Based on many years of Database Security Research, the proposed solution detects a wide range of specific and general forms of misuse, provides detailed reports, and has a low false-alarm rate. Traditional commercial implementations of database security mechanisms are very limited in defending successful data attacks. Authorized but malicious transactions can make a database useless by impairing its integrity and availability. The proposed solution offers the ability to detect misuse and subversion through the direct monitoring of database operations inside the database host, providing an important complement to host-based and network-based surveillance. Suites of the proposed solution may be deployed throughout a network, and their alarms man-aged, correlated, and acted on by remote or local subscribing security services, thus helping to address issues of decentralized management.
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