Alex Biryukov
LightNews LightNews
alexcryptan.bsky.social
Alex Biryukov
@alexcryptan.bsky.social
32 followers 18 following 8 posts
Backup account.
Posts Replies Media Videos
Reposted by Alex Biryukov
samuelmoore.org
CNRS cancels Web of Science in order to focus on qualitative evaluation and promoting the development of open databases.

www.cnrs.fr/en/update/cn...
The CNRS is breaking free from the Web of Science
From January 1st 2026, the CNRS will cut access to one of the largest commercial bibliometric databases, Clarivate Analytics'
www.cnrs.fr
December 1, 2025 at 12:31 PM
alexcryptan.bsky.social
Workshop on Transparency, Regulation, and Analytics in Crypto-Asset Ecosystems, deadline extended till 15 September 2025 brains.dnac.org/2025/trace/
TRACE - BRAINS 2025
Transparency, Regulation, and Analytics in Crypto-Asset … Continue reading →
brains.dnac.org
September 10, 2025 at 11:48 AM
alexcryptan.bsky.social
We are potentially interested in PET EU call HORIZON-CL3-2025-02-CS-ECCC-03. Drop me an e-mail if you are looking for partners.
August 28, 2025 at 3:19 PM
alexcryptan.bsky.social
Closes a decade of search for the exact formula.
eprint.ing.bot ePrint Updates @eprint.ing.bot · Mar 26
Exact Formula for RX-Differential Probability through Modular Addition for All Rotations (Alex Biryukov, Baptiste Lambin, Aleksei Udovenko) ia.cr/2025/550
Abstract. This work presents an exact and compact formula for the probability of rotation-xor differentials (RX-differentials) through modular addition, for arbitrary rotation amounts, which has been a long-standing open problem. The formula comes with a rigorous proof and is also verified by extensive experiments. Our formula uncovers error in a recent work from 2022 proposing a formula for rotation amounts bigger than 1. Surprisingly, it also affects correctness of the more studied and used formula for the rotation amount equal to 1 (from TOSC 2016). Specifically, it uncovers rare cases where the assumptions of this formula do not hold. Correct formula for arbitrary rotations now opens up a larger search space where one can often find better trails. For applications, we propose automated mixed integer linear programming (MILP) modeling techniques for searching optimal RX-trails based on our exact formula. They are consequently applied to several ARX designs, including Salsa, Alzette and a small-key variant of Speck, and yield many new RX-differential distinguishers, some of them based on provably optimal trails. In order to showcase the relevance of the RX-differential analysis, we also design Malzette, a 12-round Alzette-based permutation with maliciously chosen constants, which has a practical RX-differential distinguisher, while standard differential/linear security arguments suggest sufficient security. Image showing part 2 of abstract.
March 28, 2025 at 8:31 PM
alexcryptan.bsky.social
Cryptography is like a door lock, when all people will be good it will not be needed. When?
March 22, 2025 at 1:27 PM
Reposted by Alex Biryukov
stedziembowski.bsky.social
The videos and slides from the Warsaw IACR Summer School on Post-Quantum Cryptography 2024 are now live. YT playlist: www.youtube.com/playlist?lis... Website (with slides): ideas-ncbr.pl/en/events/pq...
Warsaw IACR Summer School on Post-Quantum Cryptography 2024 - YouTube
This playlist contains recordings of lectures from the Warsaw IACR Summer School on Post-Quantum Cryptography 2024. The event took place on July 15-19, 2024,...
www.youtube.com
January 21, 2025 at 11:56 AM
alexcryptan.bsky.social
Created and account here and was immediately followed by a bot, not sure it is a good sign.
December 29, 2024 at 9:08 AM