Hi there,

It’s just 4 weeks before our next Swiss Crypto Day at EPFL, Lausanne, which this time falls on Halloween! We hope to spook you out with crazy Isogenies and weak ciphers you thought were strong!

If you didn’t register yet, you can do so at the following address:

https://scd2025.c4dt.org/

If you already registered, please fill out the form here:

https://scd2025.c4dt.org/conferences/scd2025/register/edit

The day will be held in room CM 1 2https://plan.epfl.ch/?room==CM%201%202 with the following program:

10:00 - Registration and Welcome Coffee 10:30 - Tako Boris Fouotsa - PRISMO: A Quaternion Signature for Isogeny Group Actions 11:00 - Bryan Ford - Usable coercion-resistant e-voting in Votegral 11:30 - Cecilia Boschini 12:00 - Lunch

13:30 - Giulio Malavolta - How to Verify that a Small Device is Quantum, Unconditionally 14:00 - Antonio Sanso - Breaking Poseidon with Graeffe: Root-Finding for Fun (and No Profit) 14:15 - Ziyi Guan - Relativized Succinct Arguments in the ROM Do Not Exist 15:00 - Afternoon Break

15:00 - Felix Günther - To be confirmed 15:30 - Francesca Falzon - Learning from Functionality Outputs: Private Join and Compute in the Real World

Looking forward to seeing you there,

Linus

PS: thanks to Claude code to provide fixes to the osem software I’m using for the webpage. It’s still clunky, but I think it should work better now. You can answer the questions, will get emails, but still have to take a ticket, even though it’s not needed :)

--

Lead Software Research Engineer EPFL – Center for Digital Trust Station 14 CH – 1015 Lausanne

G [he/him/his; il/lui/son; er/ihm/sein] P +41 21 693 67 70 E linus.gasser@epfl.ch W c4dt.epfl.ch