Latest news! In September 2023, I joined NYU as an Assistant Professor in Computer Science at the NYU Courant Institute of Mathematical Sciences, and as Affiliated Interdisciplinary Faculty at the NYU School of Law.

I am looking for motivated students to work with. I’m starting a new research group at NYU focused on security, transparency, law, and policy. My research focuses on technologies in societal context — ranging from computer-science projects designing new cryptographic systems (to improve privacy or transparency), to law/policy projects arguing for better regulation of technology or analyzing existing policies. See the rest of my website (below) for more background, and please reach out if you’re a prospective student interested in working with me. (A background in either CS or law is useful but not required; we need more diverse perspectives in this field!)

I do academic research in technology law and policy, cryptography, and computer security. I think a lot about security, privacy, and transparency in digital technologies. I received my J.D. at Harvard Law School, my Ph.D. in computer science at MIT (advised by Shafi Goldwasser), and my B.A. in computer science at the University of Cambridge.

My past academic affiliations include the Internet Policy Research Initiative and the Cryptography and Information Security Group at MIT (as a Ph.D. student), the MIT Media Lab’s Digital Currency Initiative (as a Ph.D. student and postdoctoral researcher), the Berkman-Klein Center for Internet & Society at Harvard University (as a fellow and later affiliate), Cornell Tech’s Digital Life Initiative (as a postdoctoral fellow), and Columbia University and Columbia Law School (as a postdoctoral fellow in computer science and law).

In fall 2023, I will be teaching:

• in the Technology Law and Policy Clinic at the NYU School of Law (with Jason Schultz, Esha Bhandari, Jake Karr, and Melodi Dincer), which does pro bono legal work on technology matters working with law students, and
• a graduate seminar on AI: Challenges in Law, Policy, and Ethics (co-organized with Kyunghyun Cho), based at the Courant Institute and aimed at computer-science and data-science students.

In spring 2024, I will be teaching a new course, Digital Technology Law, at the NYU School of Law.

In 2020, Kendra Albert and I co-authored A Researcher's Guide to Some Legal Risks of Security Research (alternate archived link), which was jointly published by the Cyberlaw Clinic at Harvard Law School and the Electronic Frontier Foundation (EFF). See our Cyberlaw Clinic blog post here.

1. The Right to Vote Securely [published pdf]
   Sunoo Park
   In the University of Colorado Law Review, Spring 2023.
2. Compelled Decryption and the Fifth Amendment: Exploring the Technical Boundaries [SSRN] [published pdf]
   Aloni Cohen and Sunoo Park
   In the Harvard Journal of Law and Technology (JOLT), Fall 2018 issue.

1. A Systematization of Voter Registration System Security [ePrint] [published pdf]
   Jack Cable, Andrés Fábrega, Sunoo Park, and Michael Specter
   To appear in the Journal of Cybersecurity (2023).
2. The Superlinearity Problem in Post-Quantum Blockchains [ePrint]
   Sunoo Park and Nicholas Spooner
   In the 27th International Conference on Financial Cryptography and Data Security (Financial Crypto 2023).
3. Cryptography, Trust, and Privacy: It's Complicated
   Ero Balsa, Helen Nissenbaum, and Sunoo Park
   In the 2nd ACM Symposium on Computer Science and Law (CSLAW 2022).
4. KeyForge: Non-Attributable Email from Forward-Forgeable Signatures [ePrint]
   *Michael Specter, Sunoo Park, and Matthew Green
   In the 30th USENIX Security Symposium (USENIX Security 2021).
5. Going from Bad to Worse: from Internet Voting to Blockchain Voting [published pdf]
   *Sunoo Park, Michael Specter, Neha Narula, and Ronald L. Rivest
   In the Journal of Cybersecurity (2021).
6. Fully Deniable Interactive Encryption [ePrint]
   Ran Canetti, Sunoo Park, and Oxana Poburinnaya
   In the 40th Annual International Cryptology Conference (CRYPTO 2020).
7. Data Structures Meet Cryptography: 3SUM with Preprocessing [arXiv]
   Alexander Golovnev, Siyao Guo, Thibaut Horel, Sunoo Park, and Vinod Vaikuntanathan
   In the 52nd ACM Symposium on the Theory of Computing (STOC 2020).
8. It Wasn't Me! Repudiability and Unclaimability of Ring Signatures [ePrint]
   Sunoo Park and Adam Sealfon
   In the 39th Annual International Cryptology Conference (CRYPTO 2019).
9. How to Subvert Backdoored Encryption: Security Against Adversaries that Decrypt [ePrint]
   Thibaut Horel, Sunoo Park, Silas Richelson, and Vinod Vaikuntanathan
   In the 10th Innovations in Theoretical Computer Science conference (ITCS 2019).
10. Static-Memory-Hard Functions and Modeling the Cost of Space vs. Time [ePrint]
    Thaddeus Dryja, Quanquan C. Liu, and Sunoo Park
    In the 16th IACR Theory of Cryptography Conference (TCC 2018).
11. Practical Accountability of Secret Processes [ePrint]
    *Jonathan Frankle, Sunoo Park, Daniel Shaar, Shafi Goldwasser, and Daniel J. Weitzner
    In the 27th USENIX Security Symposium (USENIX Security 2018).
12. Proactive Secure Multiparty Computation with a Dishonest Majority
    Karim Eldefrawy, Rafail Ostrovsky, Sunoo Park, and Moti Yung
    In the 11th Conference on Security and Cryptography for Networks (SCN 2018).
13. SpaceMint: A Cryptocurrency Based on Proofs of Space [pdf] [ePrint]
    *Sunoo Park, Albert Kwon, Georg Fuchsbauer, Peter Gaži, Joël Alwen, and Krzysztof Pietrzak
    In the 22nd International Conference on Financial Cryptography and Data Security (Financial Crypto 2018).
14. Public Accountability vs. Secret Laws: Can They Coexist? [ePrint]
    Shafi Goldwasser and Sunoo Park
    In the 16th Workshop on Privacy in the Electronic Society (WPES) at CCS 2017.
15. Towards Secure Quadratic Voting [pdf] [ePrint]
    Sunoo Park and Ronald L. Rivest
    In Public Choice 2017.
16. How to Incentivize Data-Driven Collaboration Among Competing Parties [pdf] [ePrint] [arXiv]
    Pablo Daniel Azar, Shafi Goldwasser, and Sunoo Park
    In the 7th Innovations in Theoretical Computer Science conference (ITCS 2016).
17. Adaptively Secure Coin-Flipping, Revisited [pdf] [ePrint] [arXiv]
    Shafi Goldwasser, Yael Tauman Kalai, and Sunoo Park
    In the 42nd International Colloquium on Automata, Languages, and Programming (ICALP 2015).
18. Cryptographically Blinded Games: Leveraging Players' Limitations for Equilibria and Profit [pdf] [arXiv]
    Pavel Hubáček and Sunoo Park
    In the 15th ACM Conference on Economics and Computation (EC 2014).

NB: In computer science, conferences and symposia are peer reviewed, and they are the primary publication outlets. In law, journals are the primary publication outlets. Authors are listed alphabetically by last name, except where indicated by an asterisk.

1. Scan, Shuffle, Rescan: Two-Prover Election Audits [ePrint]
   Douglas W. Jones, Sunoo Park, Ronald L. Rivest, and Adam Sealfon

• IEEE Security and Privacy (“Oakland”) 2022 & 2023
• IEEE Security and Privacy (“Oakland”) 2022 & 2023 — Research Ethics Committee
• Neural Information Processing Systems (NeurIPS) 2022 & 2023 — Research Ethics Committee
• ACM Symposium on Computer Science & Law (CSLAW) 2022
• ACM Conference on Fairness, Accountability, and Transparency (FAccT) 2021
• Journal of Cryptoeconomic Systems 2020
• IACR Theory of Cryptography Conference (TCC) 2020

sunoo·park at nyu·edu   (PGP key / fingerprint)

60 Fifth Avenue, Room 316, New York, NY 10011, USA

Please note: In fall 2024, I am at the computer science department most Tuesdays and Fridays and at the law school most Mondays and Thursdays.