I am currently a research scientist in the Computer Science Department at the University of Massachusetts at Amherst working with the Digital Forensics Laboratory and the Database Group. I completed my PhD at UMass in 2010.
My interests include large scale data processing and analysis, design and maintenance of distributed databases, and security and scalability for cryptocurrencies.
[PDF] An Analysis of Attacks on Blockchain Consensus, by George Bissas, Brian Levine, A. Pinar Ozisik, Gavin Andresen, and Amir Houmansadr. arXiv preprint arXiv:1610.07985, October 2016.
[PDF] A Secure, Efficient, and Transparent Network Architecture for Bitcoin, by A. Pinar Ozisik, Gavin Andresen, George Bissias, Amir Houmansadr, Brian Levine. University of Massachusetts Amherst Tech Report UM-CS-2016-006, October 2016.
[PDF] Sybil-Resistant Mixing for Bitcoin, by George Bissias, A. Pinar Ozisik, Brian N. Levine, and Marc Liberatore. In Proceedings of ACM Workshop on Privacy in the Electronic Society (WPES), November 2014.
[PDF] Assessing the Vulnerability of Replicated Network Services, by George Dean Bissias, Brian Neil Levine, and Ramesh Sitaraman. Conference on emerging Networking EXperiments and Technologies , November 2010.
[PDF] Frequency-Based Relay Placement in Mobile Networks, by George Dean Bissias, Brian Neil Levine, and Ramesh Sitaraman. Technical Report UM-CS-2009-045, 2009.
[PDF] Surviving Attacks on Disruption-Tolerant Networks without Authentication, by John Burgess, George Dean Bissias, Mark Corner, and Brian Neil Levine. International Symposium on Mobile Ad Hoc Networking and Computing, September 2007.
[PDF] Bounding Damage From Link Destruction with Application to the Internet (extended abstract), by George Dean Bissias, Brian Neil Levine, and Arnold Rosenberg. In Proceedings of ACM SIGMETRICS, June 2007.
[PDF] Privacy Vulnerabilities in Encrypted HTTP Streams, by George Dean Bissias, Marc Liberatore, David Jensen, and Brian Neil Levine. In Proceedings of Privacy Enhancing Technologies Workshop (PET), May 2005.