CSE 5392 Sensor Network Security

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1 About Instructor CSE 5392 Sensor Network Security Course Introduction Dr. Donggang Liu, assistant professor, CSE department Tel: (817) Office: 330NH Office hours: Tuesday&Thursday 5:00PM-6:00PM CSE 5392 By Dr. Donggang Liu 1 CSE 5392 By Dr. Donggang Liu 2 About TA TBD Office hours: TBD Course Objectives Understanding of fundamental concepts, principles, and mechanisms in sensor network security Prepare students for graduate research in sensor network security Advanced topics: key management, security services, etc Recently published research papers CSE 5392 By Dr. Donggang Liu 3 CSE 5392 By Dr. Donggang Liu 4 Course Outcomes Basic Explain known security problems in sensor networks Explain how security mechanisms work for sensor networks Distinguish difference between security problems in sensor networks and those in wired networks. Advanced Identify and analyze new security problems in sensor networks Develop mechanisms to solve security problems in sensor networks. Design simulations to evaluate and analyze the performance of algorithms in sensor networks CSE 5392 By Dr. Donggang Liu 5 Course Style By instructor Sensor network basics Cryptography and security basics Sensor network security By students Read research papers on sensor network security Write reviews Give in-class presentations (15~20 minutes) CSE 5392 By Dr. Donggang Liu 6 1

2 Prerequisites Required Computer network Operating system Necessary for great success Technical writing skills Hardworking Textbooks and Papers No textbooks Reference books Handbook of Applied Cryptography by Alfred J. Menezes, Paul C. Van Oorschot, Scott A. Vanstone ( Cryptography and Network Security: Principles and Practice by William Stallings. Practical Cryptography by Niels Ferguson, Bruce Schneier Papers and Slides Links in the course syllabus CSE 5392 By Dr. Donggang Liu 7 CSE 5392 By Dr. Donggang Liu 8 Projects Group 2~3 students Working alone must be justified Roles can be negotiated inside the group Topics Should be relevant to the class Each group can come up with one The instructor can also give topics (check website) Projects (Cont d) Survey paper Surveys a particular field on sensor network security Summarizes the trend in this field A proposal (due on 6/10) and a final paper (due on 1/12) Research paper Identify original research problems A research paper with original technical contribution A proposal (due on 6/10) and a final paper (due on 1/12) Start thinking about your team and topic NOW CSE 5392 By Dr. Donggang Liu 9 CSE 5392 By Dr. Donggang Liu 10 On-line resource Course website For course materials, e.g., papers, homework, project assignment. Check frequently for updates Grading Paper review 20% Participation 10% Project 40% Class presentation 30% + 10% extra CSE 5392 By Dr. Donggang Liu 11 CSE 5392 By Dr. Donggang Liu 12 2

3 Course Policies Assignment (paper review) and project deadlines will be firm. Late assignments will be accepted with a 10% reduction in grade for each day they are late by. All assignments must be turned in before the start of class on the due date Academic Integrity The university, college, and department policies against academic dishonesty will be strictly enforced. CSE 5392 By Dr. Donggang Liu 13 CSE 5392 By Dr. Donggang Liu 14 Course Topics Cryptography and security basics Sensor network basics Useful security tools One way hash chain Merkle hash tree Security in Sensor Networks Key management Broadcast authentication Secure localization Secure data aggregation Intrusion detection Privacy CSE 5392 By Dr. Donggang Liu 15 CSE 5392 Sensor Network Security Basic Security Concepts CSE 5392 By Dr. Donggang Liu 16 Cryptography and Security Cryptography Study of fundamental algorithms to protect data Encryption/decryption, hash, digital signature, etc. Security Study of protocols to protect a system Usually build upon cryptographic techniques Security Objectives Secrecy (Confidentiality) Integrity Availability (Denial of Service) CSE 5392 By Dr. Donggang Liu 17 CSE 5392 By Dr. Donggang Liu 18 3

4 Secrecy (Confidentiality) Prevent/detect/deter improper disclosure of information An employee should not come to know the salary of his manager The target coordinates of a missile should not be improperly disclosed Integrity Prevent/detect/deter improper modification of information An employee should not be able to modify the employee's own salary The target coordinates of a missile should not be improperly modified CSE 5392 By Dr. Donggang Liu 19 CSE 5392 By Dr. Donggang Liu 20 Availability (Denial of Service) Prevent/detect/deter improper denial of access to services provided by the system Paychecks should be printed on time as stipulated by law When the proper command is issued the missile should fire Other Security Objectives Non-repudiation Prevent an entity from denying the previous commitments or actions Securing computing resources: Prevent/detect/deter improper use of computing resources Hardware Resources Software resources Data resources Anonymity Prevent the disclosure of the identify of an entity to others CSE 5392 By Dr. Donggang Liu 21 CSE 5392 By Dr. Donggang Liu 22 Achieving Security Security policy What? Security mechanism How? Security assurance How well? Security Policy The set of rules that regulate how an organization manages, protects, and distributes sensitive information. Convert organization requirements to security policy that a computer system can understand Interact with human being Check and remove conflict rules CSE 5392 By Dr. Donggang Liu 23 CSE 5392 By Dr. Donggang Liu 24 4

5 Security Mechanism Prevention Access control Detection Auditing and intrusion detection Tolerance Practicality Good prevention and detection both require good authentication as as a foundation Security Mechanisms Security mechanisms implement functions that help prevent, detect, and respond to security attacks Prevention is more fundamental, but sometimes detection is the only option, e.g., Accountability inproper use of authorized privileges Security functions are typically made available to users as a set of security services through APIs or integrated interfaces Security services: confidentiality, authentication, integrity, non-repudiation, access control, monitor & response Cryptography underlies (almost) all security mechanisms CSE 5392 By Dr. Donggang Liu 25 CSE 5392 By Dr. Donggang Liu 26 Security Assurance How well your security mechanisms guarantee your security policy Everyone wants high assurance High assurance implies high cost May not be possible Trade-off is needed. CSE 5392 By Dr. Donggang Liu 27 5

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