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Reposted by Andrea Basso

Maria Corte-Real Santos @maria.isogeny.club · 18d

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

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Reposted by Andrea Basso

Krijn Reijnders @krijn.isogeni.es · 26d

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 Isogeny Problems

isogeni.es

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Reposted by Andrea Basso

Diego F. Aranha @dfaranha.bsky.social · Sep 9

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

csa-scientist-open-letter.org

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Andrea Basso @andreavbasso.bsky.social · Sep 9

If you're a researcher in cryptography, security, or related areas, please consider signing it too. Signature collection is still open!

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Andrea Basso @andreavbasso.bsky.social · Sep 9

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

csa-scientist-open-letter.org

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Andrea Basso @andreavbasso.bsky.social · Sep 3

New somewhat redesigned, somewhat expanded website at andreabasso.com!

If you find any dead links or things not working properly, please let me know

andrea basso

andreabasso.com

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Reposted by Andrea Basso

ePrint Updates @eprint.ing.bot · Jul 31

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

Abstract. The Learning with Rounding (LWR) problem, introduced as a deterministic variant of Learning with Errors (LWE), has become a promising foundation for post-quantum cryptography. This Systematization of Knowledge (SoK) paper presents a comprehensive survey of the theoretical foundations, algorithmic developments, and practical implementations of LWR-based cryptographic schemes. We introduce LWR within the broader landscape of lattice-based cryptography and post-quantum security, highlighting its advantages such as reduced randomness, improved efficiency, and enhanced side-channel resistance. We explore the evolution of security reductions from LWR to LWE, including recent advances that support practical parameter regimes and address challenges in both bounded and unbounded sample settings. This paper systematically reviews existing LWR-based schemes — including Saber, Lizard, Florete, Espada, Sable, and SMAUG — analyzing their design choices, parameter sets, and performance trade-offs. Furthermore, we examine the impact of LWR on side-channel resistance, failure probabilities, and masking efficiency, demonstrating its suitability for secure and efficient implementations. By consolidating the research spanning theory and practice, this SoK aims to guide future cryptographic design and standardization efforts leveraging LWR.

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Reposted by Andrea Basso

Diego F. Aranha @dfaranha.bsky.social · Jul 5

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

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Reposted by Andrea Basso

Sofia Celi @claucece.bsky.social · Jun 25

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

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Reposted by Andrea Basso

Sam Jaques @sejaques.bsky.social · Jun 19

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!

A chart for quantum computers, of number of qubits versus error rate, on a logarithmic scale. Broadly it shows a large gap between current quantum computers in the bottom left, and a curve in the top right of the resources they need to break RSA.

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Andrea Basso @andreavbasso.bsky.social · Jun 14

I’m afraid not :(

Andrea Basso @andreavbasso.bsky.social · Jun 10

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...

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Andrea Basso @andreavbasso.bsky.social · May 28

For any polynomial-time abbiatese A...

(abbiategrassese? abbiatese grasso?)

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Andrea Basso @andreavbasso.bsky.social · May 27

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?

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Andrea Basso @andreavbasso.bsky.social · May 25

Really cool post on DH!

Filippo Valsorda @filippo.abyssdomain.expert · May 24

"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.)

There is no Diffie-Hellman but Elliptic Curve Diffie-Hellman

When I first learned about Diffie-Hellman and especially elliptic curve Diffie-Hellman, I had one rather obvious question: Why elliptic curves? Why use this strange group that seems rather arbitrar…

keymaterial.net

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Andrea Basso @andreavbasso.bsky.social · May 19

Starting in half an hour!

Andrea Basso @andreavbasso.bsky.social · May 17

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)

Title of the PhD course: Advances in Cryptography and Codes - Part 1: SQIsign

Lecturers: Andrea Basso (IBM Research Zurich, CH),
Luciano Maino (University of Bristol, UK)

The course in short: The course offers a comprehensive and rigorous introduction
to SQIsign, an advanced isogeny-based digital signature scheme designed to resist
attacks from quantum computers. The course will present the mathematical
foundations on which SQIsign is based and the algorithmic background necessary to
understand and evaluate the security of SQIsign and other isogeny-based protocols.
Complementing the theoretical material, the course also includes a practical
laboratory where students will use SageMath to study and implement various
aspects of SQIsign.

Where (in presence): Department of Mathematics, University of Trento (IT)
Via Sommarive, 5, 38123, Trento
(online): https://unitn.zoom.us/j/88902079708 (Passcode: 532383)
When: From May 19, 2025 to May 28, 2025

Detailed Program:
Monday 19/05 10:30 - 12:30 (Room A205) & 14:30 - 16:30 (Room A221)
Tuesday 20/05 10:30 - 12:30 (Room A215) & 14:30 - 16:30 (Room A213)
Wednesday 21/05 10:30 - 12:30 (Room A218) & 14:30 - 16:30 (Room A215)
Thursday 22/05 10:30 - 12:30 (Room A209) & 14:30 - 16:30 (Room A220)
Friday 23/05 10:30 - 12:30 (Room A215) & 14:30 - 16:30 (Room A215)
Tuesday 27/05 11:30 - 12:30 – Q&A, optional (Room A218)
Wednesday 28/05 11:30 - 12:30 – Q&A, optional (Room A218)

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Andrea Basso @andreavbasso.bsky.social · May 18

By 2030 we will all be out of jobs

Andrea Basso @andreavbasso.bsky.social · May 18

👀

Andrea Basso @andreavbasso.bsky.social · May 18

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)

A timeline of isogeny-based signatures over the years:
2012 - A signature from group actions: First signature from
isogenies in the literature
2014 - SIDH: Also proposes an identification protocol
2016 - GPS: First signature from endomorphism ring knowledge
2018 - SeaSign: First signature based on CSIDH
2020 - SQIsign: Compact and “practical" signature from endomorphism ring knowledge
2023 - SQIsignHD: HD representations make SQIsign signing much faster
2024 - SQIsign2D: Significantly improved SQIsign signing and verification

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Reposted by Andrea Basso

Diego F. Aranha @dfaranha.bsky.social · May 15

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.

Decrypting Diversity Summit

decryptingdiversity.com

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Andrea Basso @andreavbasso.bsky.social · May 17

It's somewhat uncertain but probably not. But we'll share the slides, Sage exercises, and other material after the course

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Andrea Basso @andreavbasso.bsky.social · May 17

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)

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Reposted by Andrea Basso

COSIC @cosic.bsky.social · May 12

🥇The paper "PRISM: Simple And Compact Identification and Signatures From Large Prime Degree Isogenies", co-authored by COSIC, has won the best paper award at @IACR_News #PKC 2025 in Røros, Norway. #pkc2025
Link: link.springer.com/chapter/10.1...

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Reposted by Andrea Basso

Nigel Smart @smartcryptology.bsky.social · Apr 4

Only a few days left to submit your paper to the second volume of the 2025 edition of Communications in Cryptology....

cic.iacr.org

IACR Communications in Cryptology

cic.iacr.org

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Reposted by Andrea Basso

Real World Crypto Symposium @rwc.iacr.org · Mar 28

Big announcement: RWC 2027 in Seattle! April 5-7 subject to board approval.

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