Valerie Gilchrist


Email: // CV: here

I am a PhD student at Université Libre de Bruxelles, working with Christophe Petit. I do research mostly in isogeny-based cryptography, either looking for algorithmic improvements to systems or investigating their security claims.

I did a Masters of Mathematics at the University of Waterloo with David Jao. My thesis was about using SQISign in an adaptor signature.

Publications and preprints

"Solving the Tensor Isomorphism Problem for special orbits with low rank points: Cryptanalysis and repair of an Asiacrypt 2023 commitment scheme." Valerie Gilchrist, Laurane Marco, Christophe Petit, Gang Tang. Accepted at CRYPTO 2024. eprint.

"Fast and Frobenius: Rational Isogeny Evaluation over Finite Fields." Gustavo Banegas, Valerie Gilchrist, Anaelle Le Devehat, Benjamin Smith. LatinCrypt 2023. eprint.

"Efficient supersingularity testing over F_p and CSIDH key validation." Gustavo Banegas, Valerie Gilchrist, Benjamin Smith. MathCrypt 2022. eprint. Video from MathCrypt. Slides.

"An Isogeny-Based Adaptor Signature Using SQISign." (Masters thesis). Valerie Gilchrist. UWSpace 2022. pdf. Slides.


  • "The State of Post-Quantum Cryptography" at Cyberus (July 2023). Slides.
  • "Computing rational isogenies from irrational kernel generators" at Isogeny Club (April 2023). Video. Slides.
  • "Efficient supsersingularity testing over F_p and CSIDH key validation" at Isogeny Days (September 2022). Video. Slides.