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The OPRF paper is finally out on eprint! A short 🧵on post-quantum OPRFs and our paper contributions (1/9). x.com/IACR_News/stat…

Do you love computing isogenies? Me too! I have written a SageMath implementation of x-only isogenies between Montgomery curves. Consider this a little preview of a bigger project I've been working on, coming soon™️ github.com/jack4818/Kumme…

The team is ready for tomorrow! Looking forward to seeing you all at Crossfyre :D #Crossfyre23

We had a great time at the rump session of IACR Eurocrypt 2023. For anyone who missed it, here's the video of The Superspecial Isogeny Club Quartet (SICQ): youtube.com/watch?v=b_Auzl…

#ePrint A Direct Key Recovery Attack on SIDH: L Maino, C Martindale, L Panny, G Pope, B Wesolowski ia.cr/2023/640

The CHES challenge was just launched at ches.iacr.org/2023/challenge…! Thanks to Matthieu Rivain & co for organizing. Please contact them in case you have questions.

Had lots of fun working on this project with Luciano Maino and Giacomo 🪿! We build a brand-new isogeny-based PKE by constructively using the same techniques that enabled the SIDH attacks. The best part? We got to call it FESTA, which is party in Italian! 🎉

Really excited to announce FESTA: a new isogeny-based PKE which I've been working on with Andrea Basso 🇺🇦 and Luciano Maino The protocol is built on top of the SIDH attacks and I'm thrilled to see Kani's criterion being used constructively in cryptography. eprint.iacr.org/2023/660

We break pSIDH in quantum polynomial time using a non-abelian hidden subgroup problem that admits a poly time algorithm. We also solve a quaternion lifting algorithm which might be of independent interest.

#ePrint Effective Pairings in Isogeny-based Cryptography: K Reijnders ia.cr/2023/858

At SandboxAQ we have open positions in cryptography. (Lead) Cryptography SWE roles and a Standardisation Engineering role. The latter might be of interest for people both coming from an engineering or a research background. See sandboxaq.com/careers for details.

Pleased to announce CryptAttackTester, a framework to systematically catch bugs in cryptanalysis. CAT tests analyses of completely specified algorithms in a simple, fully defined cost metric. Includes many ISD attacks + AES-128. Joint work with Tung Chou. cat.cr.yp.to

In case you still want to learn the Luciano Maino Chloe Martindale Yahya Mohammed Giacomo 🪿 Benjamin Wesolowski 's attack (the simple version Algorithm 1) I have just created github.com/asanso/sidh/bl… .This doesn't generalize like github.com/Breaking-SIDH/… (Algorithm 2) but is simpler to understand(IMHO)

Happy to announce that ECC 2024, the 25th Workshop on Elliptic Curve Cryptography, will take place in Taipei, Taiwan Oct 30 - Nov 01, 2024. The workshop will be preceeded by an autumn school on isogenies. For more see troll.iis.sinica.edu.tw/ecc24/index.sh… You can sign up up for annoucements