1 / 10

Wireless Sensor Networks Security

Wireless Sensor Networks Security. Lindsey McGrath and Christine Weiss. Agenda. Introduction Background - Problem Statement Requirements for Sensor Network Security Attacks on Sensor Networks Security Services Challenges Conclusion . Introduction. What is a Sensor Network ?

lawanda
Télécharger la présentation

Wireless Sensor Networks Security

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Wireless Sensor Networks Security Lindsey McGrath and Christine Weiss

  2. Agenda • Introduction • Background - Problem Statement • Requirements for Sensor Network Security • Attacks on Sensor Networks • Security Services • Challenges • Conclusion

  3. Introduction • What is a Sensor Network ? • A heterogeneous system combining tiny sensors and actuators with general-purpose computing elements. Most consisting of hundreds or thousands of low-power, low-cost nodes deployed to monitor and affect the environment. • What are they used for? • Ocean and wildlife monitoring. • Monitoring of manufactured machinery. • Building safety. • Earthquake monitoring. • Variety of military applications. • Medical monitoring and research. • Addressing Sensor Network Security…existing security mechanisms are inadequate! What are the security issues? What security services will work?

  4. Background-Problem Statement • Network Assumptions • Insecure links – non denial of eavesdropping. • Replay and injection of packets. • Non tamper resistant. • Trust Requirements • Base station and aggregation point trustworthiness. • Threat Models • Outsider vs. insider attacks. • Mote-class vs. laptop-class attackers. • Security Goals • Integrity, authentication, freshness and confidentiality.

  5. Requirements for WSN Security • Data Confidentiality – omission of data leaks to neighboring networks. • Data Authentication – verification of sender/receiver. • Data Integrity – non altered transmission of data. • Data Freshness – ensuring data is recent while allowing for delay estimation.

  6. Attacks on WSN • Spoofed, altered and replayed routing information • Selective Forwarding • Sinkhole attacks • The Sybil attack • Wormholes

  7. Security Services • Link-layer encryption and authentication • Multi-path routing • Identity verification • Bidirectional link verification • Authenticated broadcasts

  8. Challenges • The existing infrastructure is already resource-starved. • Communication bandwidth • Power • Computational power • Preventing insider attacks. • Sinkhole attacks and wormholes – no known countermeasures to apply after the protocol is designed. • Building multi-hop routing topology - Nodes within one or two hops of the base station are attractive to intruders.

  9. Conclusion • Currently proposed routing protocols for WSNs are insecure but vital. • Link layer encryption and authentication mechanisms provide reasonable defense for mote-class outsider attacks. • Cryptography is inefficient in preventing against laptop-class and insider attacks. • Remains an open problem for additional research and development.

  10. Resources • Perrig, A., Stankovic, J., and Wagner, D. 2004. Security in wireless sensor networks. Commun. ACM 47, 6 (Jun. 2004), 53-57. • Perrig, A., Szewczyk, R., Tygar, J. D., Wen, V., and Culler, D. E. 2002. SPINS: security protocols for sensor networks. Wirel. Netw. 8, 5 (Sep. 2002), 521-534. • Karlof, C. and Wagner, D. Secure routing in wireless sensor networks: Attacks and countermeasures. In Proceedings of the 1st IEEE International Workshop on Sensor Network Protocols and Applications (Anchorage, AK, May 11, 2003). • Hu, Y.-C., Perrig, A., and Johnson, D. Packet leashes: A defense against wormhole attacks in wireless ad hoc networks. In Proceedings of IEEE Infocom 2003 (San Francisco, Apr. 1--3, 2003). • L. Zhou and Z. Haas, “Securing ad hoc networks,” IEEE NetworkMagazine, vol. 13, no. 6, November/December 1999. • Y.-C. Hu, A. Perrig, and D. B. Johnson, “Wormhole detection in wireless ad hoc networks,” Department of Computer Science, Rice University, Tech. Rep. TR01-384, June 2002.

More Related