Insider Usually Harder to defend Intrusion Detection and Containment in Database Systems 3.pdf

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2017-04-06 发布于江苏
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Insider Usually Harder to defend Intrusion Detection and Containment in Database Systems 3.pdf

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Insider Usually Harder to defend Intrusion Detection and Containment in Database Systems 3

Intrusion Detection and Containment in Database Systems Abhijit Bhosale M.Tech (IT) School of Information Technology, IIT Kharagpur 1 Nov 2004 Intrusion Detection and Containment in Database Systems 2 Topics Intrusion and Intrusion Detection Intrusion Detection in Database Systems Data Mining Approach Intrusion Detection in Real-time Database Systems Misuse Detection System for Database Systems Recovery from Malicious Transactions Malicious Activity Recovery Transaction (MART) Repair using Transaction Dependency Graph 1 Nov 2004 Intrusion Detection and Containment in Database Systems 3 Intrusion Intrusion: The act of wrongfully entering upon, seizing, or taking possession of the property of another Types of Attacks ? Outsider : Can be defended using physical protection and strong network security mechanisms. ? Insider : Usually Harder to defend 1 Nov 2004 Intrusion Detection and Containment in Database Systems 4 Intrusion Detection Detection Techniques Misuse Detection ? Detect know patterns of intrusions Anomaly Detection ? Suspect the anomalous behaviors 1 Nov 2004 Intrusion Detection and Containment in Database Systems 5 Intrusion Detection in Databases Under threat by insider attacks Intruders get access to database by employing SQL Injection to poorly coded web-based applications or by stealing password of legitimate user Very few existing misuse detection systems have concepts of misuse detection in database systems 1 Nov 2004 Intrusion Detection and Containment in Database Systems 6 Data Mining Approach Proposed by Yi Hu and Brajendra Panda Uses data dependencies (access correlation) among the data items to generate association rules The rules give dependency of read/write operations of some items on write operations of some items Less sensitive to user behavior changes 1 Nov 2004 Intrusion Detection and Containment in Database Systems 7 Data Mining Approach (cont.) Definitions Sequence: It’s an ordered list of read and/or write ope