On 29 September, Benjamin Wesolowski will give a talk at The Isogeny Club on his recent p^{1/3+o(1)} attack on the isogeny problem! See you all there 🥳 isogeny.club
The Isogeny Club
isogeny.club
September 23, 2026 at 9:09 AM
On 29 September, Benjamin Wesolowski will give a talk at The Isogeny Club on his recent p^{1/3+o(1)} attack on the isogeny problem! See you all there 🥳 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
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
September 15, 2025 at 7:43 AM
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
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
Catch up on last weeks Isogeny Club talk! We welcomed Eli Orvis who taught us about abstract isogeny graphs: www.youtube.com/watch?v=Gzcc...
The Isogeny Club #7.4 Ihara zeta functions of abstract isogeny graphs and modular curves
YouTube video by The Isogeny Club
www.youtube.com
November 13, 2025 at 9:54 AM
Catch up on last weeks Isogeny Club talk! We welcomed Eli Orvis who taught us about abstract isogeny graphs: www.youtube.com/watch?v=Gzcc...
April 4, 2026 at 4:41 PM
"Algorithms for solving the isogeny problem with oriented elliptic curves" is accepted to IACR Communications in Cryptology.
Paper: eprint.iacr.org/2026/1219
Paper: eprint.iacr.org/2026/1219
Algorithms for solving the isogeny problem with oriented elliptic curves
We introduce WayFinder, a framework for generalizing the Delfs-Galbraith and SuperSolver algorithms for the supersingular isogeny problem. Our framework extends the search for elliptic curves with an ...
eprint.iacr.org
September 23, 2026 at 12:06 PM
"Algorithms for solving the isogeny problem with oriented elliptic curves" is accepted to IACR Communications in Cryptology.
Paper: eprint.iacr.org/2026/1219
Paper: eprint.iacr.org/2026/1219
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!!
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!!
The Isogeny Problems
A list of foremost unsolved problems in isogeny-based cryptography, with expositions by leading experts.
isogeni.es
July 16, 2026 at 6:11 PM
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!!
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!!
Rise and shine, it's time for the Isogeny Club Season Nine! isogeny.club
The Isogeny Club
isogeny.club
September 3, 2026 at 1:57 PM
Rise and shine, it's time for the Isogeny Club Season Nine! isogeny.club
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
📅 10–12 Sept 2025 @ KU Leuven
Morning: research talks
Afternoon: brainstorming sessions
More info: www.esat.kuleuven.be/cosic/projec...
#isogeny #isocrypt #erc #postquantum
June 16, 2025 at 6:17 AM
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
📅 10–12 Sept 2025 @ KU Leuven
Morning: research talks
Afternoon: brainstorming sessions
More info: www.esat.kuleuven.be/cosic/projec...
#isogeny #isocrypt #erc #postquantum
Next week (Tuesday 5pm CET) at The Isogeny Club we'll have Laurane Marco (EPFL) who will talk to us about computing modular polynomials modulo a generic prime! More details at isogeny.club
The Isogeny Club
isogeny.club
March 6, 2025 at 12:58 PM
Next week (Tuesday 5pm CET) at The Isogeny Club we'll have Laurane Marco (EPFL) who will talk to us about computing modular polynomials modulo a generic prime! More details at isogeny.club
The supersingular isogeny problem in time and memory p^(1/3 + o(1)) (Benjamin Wesolowski) ia.cr/2026/1486
July 23, 2026 at 10:05 PM
The supersingular isogeny problem in time and memory p^(1/3 + o(1)) (Benjamin Wesolowski) ia.cr/2026/1486
Absolutely thrilled for season six of the Isogeny Club (isogeny.club) starting February 25th by a talk by Abel Laval!
The Isogeny Club
isogeny.club
February 4, 2025 at 10:27 AM
Absolutely thrilled for season six of the Isogeny Club (isogeny.club) starting February 25th by a talk by Abel Laval!
We’re excited to announce the 7th edition of the Leuven Isogeny Days (Sept 16–18, 2026)!
Registration is now open, join us!
More info & signup: esat.kuleuven.be/cosic/projec...
#LID #Isogeny #IsogenyDays
Registration is now open, join us!
More info & signup: esat.kuleuven.be/cosic/projec...
#LID #Isogeny #IsogenyDays
July 22, 2026 at 9:38 AM
We’re excited to announce the 7th edition of the Leuven Isogeny Days (Sept 16–18, 2026)!
Registration is now open, join us!
More info & signup: esat.kuleuven.be/cosic/projec...
#LID #Isogeny #IsogenyDays
Registration is now open, join us!
More info & signup: esat.kuleuven.be/cosic/projec...
#LID #Isogeny #IsogenyDays
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! 🥳
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
March 4, 2025 at 9:44 AM
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! 🥳
we present an effective group action:
Its so efficient,
that frob is sufficient;
another win for the isogeny-faction! 🥳
We have a new PhD student: Milan Boutros!
Milan will be working on post-quantum cryptography, focusing on isogeny-based, code-based and multivariate cryptography.
Milan will be working on post-quantum cryptography, focusing on isogeny-based, code-based and multivariate cryptography.
September 22, 2026 at 10:26 AM
We have a new PhD student: Milan Boutros!
Milan will be working on post-quantum cryptography, focusing on isogeny-based, code-based and multivariate cryptography.
Milan will be working on post-quantum cryptography, focusing on isogeny-based, code-based and multivariate cryptography.
The Isogeny Problems (Wouter Castryck, Luca De Feo, Steven D. Galbraith, Péter Kutas, Krijn Reijnders, Benjamin Wesolowski) ia.cr/2026/1431
July 16, 2026 at 5:31 PM
The Isogeny Problems (Wouter Castryck, Luca De Feo, Steven D. Galbraith, Péter Kutas, Krijn Reijnders, Benjamin Wesolowski) ia.cr/2026/1431
Supersingular isogeny Diffie-Hellman was never destined to be a Super PAC.
December 16, 2023 at 3:40 PM
Supersingular isogeny Diffie-Hellman was never destined to be a Super PAC.
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!
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!
March 13, 2025 at 5:30 PM
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!
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!
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
September 23, 2025 at 7:23 AM
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
I am so so proud of this article 🤩 if you care about supersingular elliptic curves, check it out. We study the smallest degree of an isogeny from a ss ec to its conjugate and give a sharp bound for this degree (depending on p), leading to studying the primes for which this bound is attained #MathSky
Yves Aubry, Roger Oyono, Christelle Vincent
Minimal degree of an isogeny between a supersingular elliptic curve and its conjugate
https://arxiv.org/abs/2607.14624
Minimal degree of an isogeny between a supersingular elliptic curve and its conjugate
https://arxiv.org/abs/2607.14624
July 17, 2026 at 8:52 PM
I am so so proud of this article 🤩 if you care about supersingular elliptic curves, check it out. We study the smallest degree of an isogeny from a ss ec to its conjugate and give a sharp bound for this degree (depending on p), leading to studying the primes for which this bound is attained #MathSky
For those who missed it, the recording is out: youtu.be/ueCfeBvx4b8?...
The Isogeny Club #6.1 KLPT² : Algebraic pathfinding in dimension two
YouTube video by The Isogeny Club
youtu.be
February 26, 2025 at 4:48 PM
For those who missed it, the recording is out: youtu.be/ueCfeBvx4b8?...
This afternoon our researcher Riccardo Invernizzi is giving a talk on "PRISM: Simple And Compact Identification and Signatures From Large Prime Degree Isogenies" at the Isogeny Club isogeny.club
The Isogeny Club
isogeny.club
December 3, 2024 at 9:09 AM
This afternoon our researcher Riccardo Invernizzi is giving a talk on "PRISM: Simple And Compact Identification and Signatures From Large Prime Degree Isogenies" at the Isogeny Club isogeny.club
Really excited to finally share PRISM, a new isogeny-based signature 🥳 joint work with lots of awesome people.
eprint.iacr.org/2025/135
eprint.iacr.org/2025/135
PRISM: Simple And Compact Identification and Signatures From Large Prime Degree Isogenies
The problem of computing an isogeny of large prime degree from a supersingular elliptic curve of unknown endomorphism ring is assumed to be hard both for classical as well as quantum computers.
In thi...
eprint.iacr.org
January 29, 2025 at 8:34 AM
Really excited to finally share PRISM, a new isogeny-based signature 🥳 joint work with lots of awesome people.
eprint.iacr.org/2025/135
eprint.iacr.org/2025/135
Let's welcome the new postdoctoral researcher in our team: Krijn Reijnders!
"I chose COSIC because of its excellent research group in cryptography, in particular isogeny-based cryptography, and, of course, the unlimited fries at lunch." 🍟#choosecosic
"I chose COSIC because of its excellent research group in cryptography, in particular isogeny-based cryptography, and, of course, the unlimited fries at lunch." 🍟#choosecosic
February 18, 2025 at 2:49 PM
Let's welcome the new postdoctoral researcher in our team: Krijn Reijnders!
"I chose COSIC because of its excellent research group in cryptography, in particular isogeny-based cryptography, and, of course, the unlimited fries at lunch." 🍟#choosecosic
"I chose COSIC because of its excellent research group in cryptography, in particular isogeny-based cryptography, and, of course, the unlimited fries at lunch." 🍟#choosecosic
SQIsign[HD] is highly secure regarding isogeny scheme weakenesses
May 27, 2024 at 9:57 AM
SQIsign[HD] is highly secure regarding isogeny scheme weakenesses
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
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
The Isogeny Club
isogeny.club
April 23, 2025 at 10:58 AM
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
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