He/Him
Professor, Director of Undergraduate Studies, Department of Computer Science & Engineering
Contact
4-211 Kenneth H. Keller Hall
200 Union Street Se
Minneapolis, MN 55455
He/Him
Professor, Director of Undergraduate Studies, Department of Computer Science & Engineering
Ph.D. in Computer Science, Carnegie Mellon University (2004)
B.A. in Mathematics and Computer Science, University of Minnesota Morris (1999)
Nick Hopper joined the Department of Computer Science & Engineering as an assistant professor in 2004. He also currently serves as the Director of Undergraduate Studies for the Department. Hopper received his Ph.D. (2004) in computer science from Carnegie Mellon University. Hopper was awarded with the NSF CAREER Award in 2006 and received a McKnight Land-Grant Professorship in 2008. Prior to his time at the University, he was a Graduate Research Fellow at Carnegie Mellon University for five years.
Hopper’s primary research interest is in online communications security and privacy. Within this field his main focus is on anonymous communication, censorship resistance, and applied cryptography. In the past, he also worked on security and privacy in peer-to-peer networks, BGP routing, electronic cash, and provable security for steganography and watermarking.
Research Division
Computing Foundations
Current Research
Google Scholar
Ph.D. Graduates
Michael Schliep (2021); Se Eun Oh (2021); Shuai Li (2019); John Geddes (2016); Max Schuchard (2016); Rob Jansen (2012); Zi Lin (2012); Eric Chan-Tin (2011); Hun Jeong Kang (2010; co-advised with Yongdae Kim); Eugene Vasserman (2010).
2008: McKnight Land-Grant Professorship
2007: Science and Engineering Student Board - Best Professor Award
2006: National Science Foundation Faculty Early Career Development Program (CAREER Award)
Selected Grants
DeepCoFFEA: Powerful and Efficient Metadata Traffic Analysis via Metric Learning and Amplification
Wright, M., Yang, S., Hopper, N.; Rochester Institute of Technology; 10/22-10/24
SaTC: CORE: Small: Models and Measurements for Website Fingerprinting
Hopper, N.; National Science Foundation; 9/18-8/23
SaTC: CORE: Small: Consistent and Private Group Communication
Hopper, N.; National Science Foundation; 9/18-8/23
Oh, S.E., Yang, T., Mathews, N., Holland, J.K., Rahman, M.S., Hopper, N., Wright, M. (2022). DeepCoFFEA: Improved Flow Correlation Attacks on Tor via Metric Learning and Amplification. In Proceedings - 43rd IEEE Symposium on Security and Privacy, SP 2022. (1915-1932). (2022 IEEE Symposium on Security and Privacy (SP).). Institute of Electrical and Electronics Engineers Inc..
DOI: 10.1109/SP46214.2022.9833801
Witwer, E., Holland, J.K., Hopper, N. (2022). Padding-only Defenses Add Delay in Tor. In WPES 2022 - Proceedings of the 21st Workshop on Privacy in the Electronic Society, co-located with CCS 2022. (29-33). (WPES 2022 - Proceedings of the 21st Workshop on Privacy in the Electronic Society, co-located with CCS 2022.). Association for Computing Machinery, Inc.
DOI: 10.1145/3559613.3563207
Holland, J.K., Hopper, N. (2022). RegulaTor: A Straightforward Website Fingerprinting Defense. Proceedings on Privacy Enhancing Technologies. 2022 (2), [344-362].
DOI: 10.2478/popets-2022-0049 Electronic version
Oh, S.E., Mathews, N., Rahman, M.S., Wright, M., Hopper, N. (2021). GANDaLF: GAN for Data-Limited Fingerprinting. Proceedings on Privacy Enhancing Technologies. 2021 (2), [305-322].
DOI: 10.2478/popets-2021-0029 Electronic version
Schliep, M., Hopper, N. (2019). End-to-end secure mobile group messaging with conversation integrity and deniability. In WPES 2019 - Proceedings of the 18th ACM Workshop on Privacy in the Electronic Society. (55-73). (Proceedings of the ACM Conference on Computer and Communications Security. (1543-7221)). Association for Computing Machinery.
DOI: 10.1145/3338498.3358644
Oh, S.E., Sunkam, S., Hopper, N. (2019). p1 -FP: Extraction, Classification, and Prediction of Website Fingerprints with Deep Learning. Proceedings on Privacy Enhancing Technologies. 2019 (3), [191-209].
DOI: 10.2478/popets-2019-0043 Electronic version
Schliep, M., Vasserman, E., Hopper, N. (2018). Consistent Synchronous Group Off-The-Record Messaging with SYM-GOTR. Proceedings on Privacy Enhancing Technologies. 2018 (3), [181-202].
DOI: 10.1515/popets-2018-0027 Electronic version
Li, S., Guo, H., Hopper, N. (2018). Measuring information leakage in website fingerprinting attacks and defenses. In CCS 2018 - Proceedings of the 2018 ACM SIGSAC Conference on Computer and Communications Security. (1977-1992). (Proceedings of the ACM Conference on Computer and Communications Security. (1543-7221)). Association for Computing Machinery.
DOI: 10.1145/3243734.3243832
Parhi, R., Schliep, M., Hopper, N. (2018). MP3: A More Efficient Private Presence Protocol. In Meiklejohn, S., Sako, K. (eds). Financial Cryptography and Data Security - 22nd International Conference, FC 2018, Revised Selected Papers. (38-57). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). 10957 LNCS. (0302-9743)). Springer Verlag.
DOI: 10.1007/978-3-662-58387-6_3
Schliep, M., Hopper, N. (2018). POSTER: End-to-End Secure Mobile Group Messaging with Conversation Integrity and Minimal Metadata Leakage. Proceedings of the ACM Conference on Computer and Communications Security. [2282-2284].
DOI: 10.1145/3243734.3278506
Jansen, R., Traudt, M., Hopper, N. (2018). Privacy-preserving dynamic learning of tor network traffic. In CCS 2018 - Proceedings of the 2018 ACM SIGSAC Conference on Computer and Communications Security. (1944-1961). (Proceedings of the ACM Conference on Computer and Communications Security. (1543-7221)). Association for Computing Machinery.
DOI: 10.1145/3243734.3243815
Oh, S.E., Li, S., Hopper, N. (2017). Fingerprinting Keywords in Search Queries over Tor. Proceedings on Privacy Enhancing Technologies. 2017 (4), [251-270].
DOI: 10.1515/popets-2017-0048 Electronic version
Schliep, M., Kariniemi, I., Hopper, N. (2017). Is bob sending mixed signals?. In WPES 2017 - Proceedings of the 2017 Workshop on Privacy in the Electronic Society, co-located with CCS 2017. (31-40). (WPES 2017 - Proceedings of the 2017 Workshop on Privacy in the Electronic Society, co-located with CCS 2017. 2017-January.). Association for Computing Machinery, Inc.
DOI: 10.1145/3139550.3139568
Johnson, A., Jansen, R., Hopper, N., Segal, A., Syverson, P. (2017). PeerFlow: Secure Load Balancing in Tor. Proceedings on Privacy Enhancing Technologies. 2017 (2), [74-94].
DOI: 10.1515/popets-2017-0017 Electronic version
Geddes, J., Schliep, M., Hopper, N. (2016). ABRA CADABRA: Magically increasing network utilization in tor by avoiding bottlenecks. In WPES 2016 - Proceedings of the 2016 ACM Workshop on Privacy in the Electronic Society, co-located with CCS 2016. (165-176). (WPES 2016 - Proceedings of the 2016 ACM Workshop on Privacy in the Electronic Society, co-located with CCS 2016.). Association for Computing Machinery, Inc.
DOI: 10.1145/2994620.2994630
Li, S., Hopper, N. (2016). Mailet: Instant Social Networking under Censorship. Proceedings on Privacy Enhancing Technologies. 2016 (2), [175-192].
DOI: 10.1515/popets-2016-0011 Electronic version
Schuchard, M., Geddes, J., Schliep, M., Hopper, N. (2016). The cost of the path not taken. In 2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings. (2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings.). Institute of Electrical and Electronics Engineers Inc..
DOI: 10.1109/GLOCOM.2016.7842316
Chan-Tin, E., Heorhiadi, V., Hopper, N., Kim, Y. (2015). Hijacking the Vuze BitTorrent network: All your hop are belong to us. IET Information Security. 9 (4), [203-208].
DOI: 10.1049/iet-ifs.2014.0337
Hopper, N., Jansen, R. (2015). WPES '15 foreword. WPES 2015 - Proceedings of the 2015 ACM Workshop on Privacy in the Electronic Society, co-located with CCS 2015. [iii].
Hopper, N., Jansen, R. (2015). WPES 2015: The 14th Workshop on Privacy in the Electronic Society. In CCS 2015 - Proceedings of the 22nd ACM SIGSAC Conference on Computer and Communications Security. (1719-1720). (Proceedings of the ACM Conference on Computer and Communications Security. 2015-October. (1543-7221)). Association for Computing Machinery.
DOI: 10.1145/2810103.2812628