Rise and shine, it's time for the Isogeny Club Season Nine! isogeny.club

Excited about isogenies? Wanna claim some rewards? Solve one of the seven Isogeny Problems, the hardest open problems in isogeny-based cryptography! Full write-up now on ePrint: ia.cr/2026/1431 Webpage: isogeni.es/problems Now with EVEN MORE REWARDS!!

So what is MIKE? It is a post-quantum NIKE (non interactive key exchange) which has many nice properties:

Accepted papers at CRYPTO 2026: iacr.org/cryptodb/dat...

New paper out 🎉 We introduce a new UPKE based on FESTA that supports unbounded updates and whose security is equivalent to FESTA! Our main result: a (four-dimensional) variant of FESTA has uniformly random public keys, which means that any random walk is a valid pk update.

ePrint Updates@eprint.ing.bot · 5mo ago

Updatable Public-Key Encryption from FESTA (Andrea Basso, Tako Boris Fouotsa, Fatna Kouider, Péter Kutas, Luciano Maino, Laurane Marco) ia.cr/2026/1014

Round 3 of the NIST additional signatures process announced! 🎉 And SQIsign is part of it!! ⛷️⛷️

Overdue quantum landscape update: sam-jaques.appspot.com/quantum_land... A 2d chart can only say so much. tl;dr new results are still overhyped, but definitely worth taking seriously. This chart is based on surface codes and a big question now is whether new codes can be practical (=>useless chart)

In honor of April Fool's Day (which has already started in Australia), I offer you debrisprint.iacr.org for AI-generated cryptology content.

We still have a few spots left at MaGIC! Registration closes this week... Hurry up if you want to be on top of all the latest news on Cryptographic Group Actions! magic-workshop.github.io

MaGIC 2026 - Marche Workshop on Group Actions in Cryptography

A workshop dedicated to the study of cryptographic group actions, a rapidly evolving area at the intersection of algebraic geometry, number theory, and post-quantum cryptography. The workshop will bri...

magic-workshop.github.io

New PRISM improvements 🥳 We extended our PRISM paper to present two new variants: one that achieves strong unforgeability, and another that allows for smaller parameters and therefore faster signatures! eprint.iacr.org/2026/443.pdf

We're organizing a workshop on cryptographic group actions bringing together the isogeny and code communities. The workshop is just before Eurocrypt, a quick train away from Rome in the beautiful Marche. Early registration ends this week, so grab your spot soon! magic-workshop.github.io

MaGIC 2026 - Marche Workshop on Group Actions in Cryptography

A workshop dedicated to the study of cryptographic group actions, a rapidly evolving area at the intersection of algebraic geometry, number theory, and post-quantum cryptography. The workshop will bri...

magic-workshop.github.io

I am very happy to announce that thanks to the hard work of many people (The "MIKE Team"), we now have a working implementation in SageMath of MIKE (Module Isogeny Key Exchange).

The IACR board sent a survey to members last year, and it took us a while to analyze the results and publish findings. You can see them at iacr.org/surveyresults/

New paper out! 🎉 We translate the algebraic group model to the (generic) isogeny setting, generalising previous results that were limited to oriented isogenies (we show that any result that holds in the AGAM also holds in the AIM). Using this model, we obtain two important results:

ePrint Updates@eprint.ing.bot · 9mo ago

The Algebraic Isogeny Model: A General Model with Applications to SQIsign and Key Exchanges (Marius A. Aardal, Andrea Basso, Doreen Riepel) ia.cr/2026/032

The Isogeny Club Season 7 starts today! At 5pm CEST, Bruno Sterner will talk about finding large smooth twins from short lattice vectors. More details at isogeny.club

Announcing The Isogeny Problems! A curated list of the seven foremost unsolved problems in isogeny-based cryptography. Solving one of these profound questions would mark a monumental advance, and as a resolver you'd get eternal honor and epic rewards! Full list: isogeni.es/problems

The EU wants to spend your money to assemble a giant mass surveillance machine with little effect on harm against children. Chat Control is not effective, weakens security for all and does not respect privacy. Contact your EU representatives and let them know. csa-scientist-open-letter.org/Sep2025

More than 500 researchers have signed an open letter against the dangerous EU proposal on chat control. The proposal remains ineffective, undoes decades of results in E2E encryption, and threatens the privacy of half a billion citizens. csa-scientist-open-letter.org/Sep2025

New somewhat redesigned, somewhat expanded website at andreabasso.com! If you find any dead links or things not working properly, please let me know

Using Learning with Rounding to Instantiate Post-Quantum Cryptographic Algorithms (Andrea Basso, Joppe W. Bos, Jan-Pieter D'Anvers, Angshuman Karmakar, Jose Maria Bermudo Mera, Joost Renes, Sujoy Sinha Roy, Frederik Vercauteren, Peng Wang, Yuewu Wang, Shicong Zhang, Chenxin Zhong) ia.cr/2025/1382

Well, this horrible idea refuses to die so we should refuse to let it pass and start organizing again. ec.europa.eu/commission/p...

Commission presents Roadmap for effective and lawful access to data for law enforcement

The European Commission presented today a Roadmap setting out the way forward to ensure law enforcement authorities in the EU have effective and lawful access to data.

ec.europa.eu

And for For PhD & advanced MSc students! 🌍 Stipends available for students worldwide — thanks to our sponsors! 📋 Apply for stipends here: docs.google.com/forms/d/e/1F... 🖼️ Consider presenting your work in the Latincrypt poster session! 🔗 More info: ascrypto.org/2025/

Call for Stipends - ASCRYPTO '25

docs.google.com

An out-of-schedule update to my quantum landscape chart: sam-jaques.appspot.com/quantum_land..., prompted by @craiggidney.bsky.social 's new paper: arxiv.org/abs/2505.15917. A startling jump (20x) in how easy quantum factoring can be! Also: much improved web design!

We (finally) published all the material from this course on SQIsign, including lecture slides and exercise sheets for the Sage laboratory. Available here: github.com/andreavico/S...

Andrea Basso@andreavbasso.bsky.social · last yr.

Next week @lucianomaino.bsky.social and I will teach a week-long course on SQIsign at the University of Trento. The course will be both in-person and online: if you're interested, you can tune in Monday morning at 10:30 at unitn.zoom.us/j/88902079708 (details and full schedule in the image below)

Every time I'm writing a paper I always have the same question: is the attacker a person? Is the attacker a they or a it?

Really cool post on DH!

Filippo Valsorda@filippo.abyssdomain.expert · last yr.

"Finite field Diffie-Hellman is also just Elliptic Curve Diffie-Hellman, just over a curve that accidentally twisted itself a bit." From the “Cryptography (Incomprehensible)” category of @sophieschmieg.infosec.exchange.ap.brid.gy's blog. (If you don't know enough math for this, don't worry, same.)

Starting in half an hour!

Andrea Basso@andreavbasso.bsky.social · last yr.

Next week @lucianomaino.bsky.social and I will teach a week-long course on SQIsign at the University of Trento. The course will be both in-person and online: if you're interested, you can tune in Monday morning at 10:30 at unitn.zoom.us/j/88902079708 (details and full schedule in the image below)

Isogeny-based signatures have consistently had a breakthrough every two years! Let's see what 2026 will bring... (Well, except for SQIsignHD that came a year too late, but that's probably because of Covid)

Registrations for the Decrypting Diversity Summit are open: decryptingdiversity.com/registration/ The event's focus is to develop actions to better support underrepresented groups in cryptography while showcasing the exceptional career paths and research contributions of these communities.

Next week @lucianomaino.bsky.social and I will teach a week-long course on SQIsign at the University of Trento. The course will be both in-person and online: if you're interested, you can tune in Monday morning at 10:30 at unitn.zoom.us/j/88902079708 (details and full schedule in the image below)