. Report Date (dd-mm-yyyy) Anomaly-based Intrusion Detection Systems Utilizing System Call Data Skormin, Victor A. Available to General Public

Form Approved OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 222024302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. 1. REPORT DATE (DD-MM-YYYY) 3/1/2012 2. REPORT TYPE FINAL REPORT 3. DATES COVERED (From To) February 1, 2009 – November 30, 2011 4. TITLE AND SUBTITLE Anomaly-Based Intrusion Detection Systems Utilizing System Call Data 5a. CONTRACT NUMBER FA9550-09-1-0067 5b. GRANT NUMBER 49527 5c. PROGRAM ELEMENT NUMBER