Ben Jones will present his Generals Exam on Tuesday, January 12, 2016 at 11am in CS 302. The members of his committee are: Nick Feamster (adviser), Andrew Appel, and Prateek Mittal. Everyone is invited to attend his talk, and those faculty wishing to remain for the oral exam following are welcome to do so. His abstract and reading list follow below. Abstract Censorship measurement is an important problem and social scientists, CS researchers, and advocacy groups all aim to discover what governments censor, how they restrict access, and how decisions about censorship vary across regions, countries, and time. Unfortunately, existing approaches cannot perform censorship measurements at a scale sufficient to answer these questions; worse, users must perform these measurements on-site, which is potentially risky due to the threat of retaliation against citizens who perform measurements. In my talk, I will present SPICE (Stealthy Panopticon for Internet Censorship Exploration) [7], a tool designed to measure censorship and evade the surveillance that puts users at risk. SPICE’s contributions are modeling censorship and surveillance, developing two strategies for reducing measurement risk, and implementing the measurements for one of these strategies. We model censorship based on existing work on the Great Firewall of China (GFC) and we model surveillance based on leaked Snowden documents and our campus IDS. We observe that surveillance and censorship systems have different goals, and thus certain types of measurement techniques may be able to characterize a censorship system without triggering a surveillance system. Although it is almost certainly impossible to eliminate risk (or even determine if we have succeeded in doing so), we posit that we may be able to reduce risk with measurement techniques that are difficult to observe or distinguish from innocuous network activity. Reading List Textbook: L. L. Peterson and B. S. Davie. Computer Networks, Fifth Edition: A Systems Approach. Morgan Kaufmann Publishers Inc., San Francisco, CA, USA, 5th edition, 2011. Papers: [1] Anonymous. Towards a Comprehensive Picture of the Great Firewall’s DNS Censorship. In 4th USENIX Workshop on Free and Open Communications on the Internet (FOCI 14), San Diego, CA, Aug. 2014. USENIX Association. [2] A. Filasto` and J. Appelbaum. OONI: Open Observatory of Network Interference. In Presented as part of the 2nd USENIX Workshop on Free and Open Communications on the Internet, Berkeley, CA, 2012. USENIX. [3] J. Geddes, M. Schuchard, and N. Hopper. Cover Your ACKs: Pitfalls of Covert Channel Censorship Circumvention. In Proceedings of the 2013 ACM SIGSAC Conference on Computer &; Communications Security, CCS ’13, pages 361–372, New York, NY, USA, 2013. ACM. [4] A. Houmansadr, C. Brubaker, and V. Shmatikov. The Parrot is Dead: Observing unobservable network communications. In Proceedings of the 2013 IEEE Symposium on Security and Privacy, 2013. [5] B. Jones, R. Ensafi, N. Feamster, V. Paxson, and N. Weaver. Ethical concerns for censorship measurement. In Proceedings of the 2015 ACM SIGCOMM Workshop on Ethics in Networked Systems Research, pages 17–19. ACM, 2015. [6] B. Jones and N. Feamster. Can Censorship Measurements Be Safe(R)? In Proceedings of the 14th ACM Workshop on Hot Topics in Networks, HotNets-XIV, pages 1:1–1:7, New York, NY, USA, 2015. ACM. [7] M. Ku ̈hrer, T. Hupperich, J. Bushart, C. Rossow, and T. Holz. Going Wild: Large-Scale Classification of Open DNS Resolvers. In Proceedings of the 2015 ACM Conference on Internet Measurement Conference, IMC ’15, pages 355–368. ACM, 2015. [8] K. Schomp, T. Callahan, M. Rabinovich, and M. Allman. On Measuring the Client-side DNS Infrastructure. In Proceedings of the 2013 Conference on Internet Measurement Conference, IMC ’13, pages 77–90, New York, NY, USA, 2013. ACM. [9] W. Scott, S. Berg, and A. Krishnamurth. Satellite: Observations of the Internets Stars. Technical report, University of Washington, 2015. [10] A. Sfakianakis, E. Athanasopoulos, and S. Ioannidis. CensMon: A Web censorship monitor. In USENIX Workshop on Free and Open Communication on the Internet (FOCI), 2011.