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Policies Based Intrusion Response System for DBMSNayeem, Fatima; Vijayakamal, M.; Dept of CSE, JNTU H, Sridevi Womens Engimeering College Hyderabad, Andhra Pradesh, India; Dept of CSE, JNTU H, Sridevi Womens Engimeering College Hyderabad, Andhra Pradesh, India (IJCSN, 2012-12-01)Intrusion detection systems play an important role in detecting online intrusions and provide necessary alerts. Intrusion detection can also be done for relational databases. Intrusion response system for a relational database is essential to protect it from external and internal attacks. We propose a new intrusion response system for relational databases based on the database response policies. We have developed an interactive language that helps database administrators to determine the responses to be provided by the response system based on the malicious requests encountered by relational database. We also maintain a policy database that maintains policies with respect to response system. For searching the suitable policies algorithms are designed and implemented. Matching the right policies and policy administration are the two problems that are addressed in this paper to ensure faster action and prevent any malicious changes to be made to policy objects. Cryptography is also used in the process of protecting the relational database from attacks. The experimental results reveal that the proposed response system is effective and useful.