Leo Orshansky

I am a 2nd-year PhD student in the Computer Science Theory Group at Columbia University, co-advised by Tal Malkin and Henry Yuen. My research is at the intersection of cryptography and quantum computing, with an emphasis on quantum cryptography (not quite a tautology, I promise 🙂).

Previously I attended UT Austin, where I studied Computer Science and Mathematics with a Minor in Chinese, and worked as an undergraduate researcher with David Soloveichik on theoretical aspects of molecular and unconventional computing.

I enjoy learning languages, doing the NYT crossword and other puzzles (especially puzzle hunts), and running.

Email: first-initial last-initial 2433 at columbia dot edu

Links: Google Scholar · Simons Institute participant profile

Selected Publications

Full publication list.

  • How To Track Qubits Through Space and Time
    (Or: Sailing in a Quantum Boat).
    J Bartusek, Z Huang, L Orshansky, H Yuen.
    2026. Forthcoming to arXiv.

  • Private proofs of when and where.
    U Girish, G Gluch, S Goldwasser, T Malkin, L Orshansky, H Yuen.
    2026.
    [arXiv, eprint]

  • Comparing classical and quantum conditional disclosure of secrets.
    U Girish, A May, L Orshansky, C Waddell.
    Quantum 10, 2049 (2025). [arXiv]