The call for papers for PKC 2026 is out: pkc.iacr.org/2026/callfor...

WaterSQI and PRISMO: Quaternion Signatures for Supersingular Isogeny Group Actions (Tako Boris Fouotsa) ia.cr/2025/1737

Quaternion signatures for isogeny group actions: showing how to adapt SQIsign and PRISM to the group actions setting, unleashing WaterSQI and PRISMO signatures that come with a tremendous speed-up over CSI-FiSh style signatures.

Come to the ASCrypto school, affiliated with Latincrypt2025! 🗓️ Sept 29–30 | Medellín, Colombia 👨‍🏫 Learn 𝐦𝐨𝐝𝐞𝐫𝐧 𝐩𝐫𝐨𝐯𝐢𝐧𝐠 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 from top experts 💥 2 days, 3 modules: IVC, STARKs, MPC 👥 With Benedikt Bünz, Sophia Yakoubov, Alan Szepieniec Organised by the amazing Arantxa Zapico and Javier Verbel.

Registration for the Leuven Isogeny Days 6 is now open! 📅 10–12 Sept 2025 @ KU Leuven Morning: research talks Afternoon: brainstorming sessions More info: www.esat.kuleuven.be/cosic/projec... #isogeny #isocrypt #erc #postquantum

AFRICACRYPT'25 accepted papers (africacrypt2025.sciencesconf.org/resource/page/…) & invited speakers (https://africacrypt2025.sciencesconf.org/resource/page/id/11) are online. Early registration deadline is May 30th (africacrypt2025.sciencesconf.org/resource/page/���). See you in Rabat 🇲🇦 in July! 😉

Isogenies @ Eurocrypt 2025 in Madrid!

The SQIparty starts on Monday, but it's still time to register! We prepared an exciting program for you with a balanced mix of talks, coding sprints, skillshares and other activities! www.cig.udl.cat/SQIparty2025... See you in Lleida!

Good news is that we're still accepting brainstorm topics!! If you have a brainstorm idea, send us a short description by email !

Season 6 of the Isogeny Club is officially done! You can catch up with all the talks here: isogeny.club If, like us, you haven't had enough isogenies for the term, be sure to join us at the Brainstorm Sessions affiliated with Eurocrypt: isogeny.club/eurocrypt

Congratulations to the new IACR fellows.... Joan Daemen, Thomas Johansson, Anna Lysyanskaya, Pascal Paillier, J.R. Rao, Alon Rosen, Elaine Shi, Bo-Yin Yang. iacr.org/fellows/ #cryptography

Higher dimensions everywhere ! #isogenies

Registration to the SQIparty is open, free, and we have a first sketch of a program! www.cig.udl.cat/SQIparty2025... Register and plan your travel quickly: the rooms are reserved only until Thursday! See you in Lleida!

It saddens to spend time reviewing a paper, then to neither be able to see the other reviews nor take part in the discussion on that paper! Program Chairs should always enable this (and choose a reviewing platform that allows them to).

Update on crypto.iacr.org/2025/

> claims no new results > adds in a tiny new result anyway > ??? anyway, enjoy the read!

This workshop is gonna be great: cool people, interesting talks, and lots of great research on SQIsign and isogeny-based crypto. Mark it in your calendars! And if you’re going to Eurocrypt, this is going to be convenient: the workshop is just the week before, and it’s not too far from Madrid

Looking forward to speaking at this event. Come and enjoy an autumn day in Rome talking #cryptography.... www.decifris.it/fcir25

Fancy some isogeny crypto? Join us for a 3-day workshop on isogeny-based cryptography in Lleida, Catalonia, April 28-30 www.cig.udl.cat/icrypto2025_... Brought to you by ULleida's Cryptography+Graphs group, the SQIsign team and friends! Registration and program coming soon Registration is free!

Registration for Eurocrypt 2025 is open!! Register at eurocrypt.iacr.org/2025/registr... Early bird registration deadline is 4th of April. Note that registration will be temporarily closed between the 29th and the 31st of March, and we'll have to cancel previous invoices left unpaid by March 30th.

And why not pair that with an isogeny workshop in Catalonia just before? bsky.app/profile/bsky...

A Note on Zero-Knowledge Simulator of the CROSS Identification Protocol (Shai Levin) ia.cr/2025/359

KLPT²: Algebraic Pathfinding in Dimension Two and Applications (Wouter Castryck, Thomas Decru, Péter Kutas, Abel Laval, Christophe Petit, Yan Bo Ti) ia.cr/2025/372

A Complete Security Proof of SQIsign (Marius A. Aardal, Andrea Basso, Luca De Feo, Sikhar Patranabis, Benjamin Wesolowski) ia.cr/2025/379

As part of the round-2 NIST submission, we developed a complete proof of security of SQIsign!

At the right level pf abstraction, we present an effective group action: Its so efficient, that frob is sufficient; another win for the isogeny-faction! 🥳

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, Benjamin Wesolowski) ia.cr/2025/401

Recommend, if you did not manage to submit to Crypto

16th International Conference on Cryptology AFRICACRYPT 2025 July 21-23, 2025 – Rabat, Morocco 🇲🇦 Extended submission deadline in 1 week: africacrypt2025.sciencesconf.org Submit your best results ! See you in Rabat 🇲🇦 in July 2025.

Attacking trapdoors from matrix products (Thomas Decru, Tako Boris Fouotsa, Paul Frixons, Valerie Gilchrist, Christophe Petit) ia.cr/2024/1332

SQIPrime: A dimension 2 variant of SQISignHD with non-smooth challenge isogenies (Max Duparc, Tako Boris Fouotsa) ia.cr/2024/773

Avoiding Trusted Setup in Isogeny-based Commitments (Gustave Tchoffo Saah, Tako Boris Fouotsa, Emmanuel Fouotsa, Célestin Nkuimi-Jugnia) ia.cr/2024/531

Slides for my talk "An Update on Lattice Cryptanalysis Vol. 1" at the Real World Post Quantum Cryptography workshop yesterday: github.com/malb/talks/b... Yes, there was a Vol 2, it was given by John Schanck and his talk was way better.

Isogeny problems with level structure (Luca De Feo, Tako Boris Fouotsa, Lorenz Panny) ia.cr/2024/459

SILBE: an Updatable Public Key Encryption Scheme from Lollipop Attacks (Max Duparc, Tako Boris Fouotsa, Serge Vaudenay) ia.cr/2024/400

Exploring SIDH-based Signature Parameters (Andrea Basso, Mingjie Chen, Tako Boris Fouotsa, Péter Kutas, Abel Laval, Laurane Marco, Gustave Tchoffo Saah) ia.cr/2023/1906

K-Waay: Fast and Deniable Post-Quantum X3DH without Ring Signatures (Daniel Collins, Loïs Huguenin-Dumittan, Ngoc Khanh Nguyen, Nicolas Rolin, Serge Vaudenay) ia.cr/2024/120

Towards a Quantum-resistant Weak Verifiable Delay Function (Thomas Decru, Luciano Maino, Antonio Sanso) ia.cr/2023/1197