Ryan Rueger

ryan@rueg.re / me.jpg
$ curl -L rueg.re/pgp | gpg --import -

Interested in algorithmic arithmetic geometry and number theory for applications in post-quantum isogeny-based cryptography.

Pre-doctoral researcher at IBM Research Zurich, pursuing a PhD from TU Munich. Advised by Luca De Feo and Lorenz Panny.

Research

PEGASIS: Practical Effective Class Group Action using 4-Dimensional Isogenies
Pierrick Dartois, Jonathan Komada Eriksen, Tako Boris Fouotsa, Arthur Herlédan Le Merdy, Riccardo Invernizzi, Damien Robert, Ryan Rueger, Frederik Vercauteren and Benjamin Wesolowski.
[PDF] [ePrint] [Implementation] In submission.

Talks

PEGASIS: Practical Effective Class Group Action using 4-Dimensional Isogenies
Invited talk Swissogeny Day #2, 20th March 2025.
[Slides]

Projects

desktopctl
Desktop environment for window managers.

create-contours
Use NASA’s STRM DEM data to create contour lines.

vim-statusryne
Lightweight statusline and tabline for Vim that prioritises low init times and latency over features.

Theses

Computing the isogeny class-group action on ordinary elliptic curves by going into higher dimensions
Master thesis
[PDF][ETH RC] [Implementation] [Slides]

Taylor Expansions of Modular Forms at CM Points
Semester thesis
[PDF] [ETH RC] [Implementation]

Eta Products
Semester thesis
[PDF] [ETH RC] [Implementation]

Blog

Installing and benchmarking Scott's ad-hoc finite field arithmetic

Is it "GPG" or "PGP"?

Regenerating `initramfs` from another snapshot with `mkinitcpio`

Cycling Zurich to Locarno via San Bernadino

Natively pretty printing `ls` output

Passwordless Git over HTTP(s) for Overleaf

Using NASA DEM data to create high resolution contour lines with QGIS

Groups of Order 4 are Commutative