Joined July 2014
43 Photos and videos
We are hiring for PhD and postdoc postions in symmetric cryptography.
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Magic Pot: Cryptanalysis of full AIM2 in the standard and related-/reused-key settings using new elimination framework (Alex Biryukov, Pablo García Fernández, Aleksei Udovenko ) ia.cr/2026/903

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Algorithmic Toolkit for Linearization of S-boxes (Alex Biryukov, Philip Tureček, Aleksei Udovenko) ia.cr/2026/913

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Alex Biryukov retweeted
With this lineup of speakers, this promises to be very interesting.
The Future of Mathematics Symposium is being held on May 1st-2nd! We have a truly exceptional group of speakers, with multiple Fields Medalists including Terence Tao. Tune in for livestream 9am-5pm PST (link below)
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Alex Biryukov retweeted
#WorldPoetryDay📜 Central medallion of the Vichten Mosaic depicting Calliope, the Muse of heroic or epic poetry, and Homer. Dated to around AD 240. National Museum of History and Art, Luxembourg.
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Alex Biryukov retweeted
13/ A key point: for years to come, bugs and implementation attacks (side-channels, fault injection) will be larger risks than CRQCs. This applies to SNARKs, signature aggregation schemes, and even signatures themselves. Invest in audits, fuzzing, and formal methods.
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Fantomasking scheme
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Fear always sells well.
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Stumbled upon some interesting stuff about FSE/ToSC: portal.core.edu.au/conf-rank… Actually came to check the ranking of something else: WCC (Workshop on Coding and Cryptography), but I didn't find it. Help would be appreciated.

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Found it until CORE 2020, Ranking B. Something weird happens with this workshop's DBLP.
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I guess this is right when aimed at own personal development, however when aimed externally beware of "idiots with initiative".
Agency > Intelligence I had this intuitively wrong for decades, I think due to a pervasive cultural veneration of intelligence, various entertainment/media, obsession with IQ etc. Agency is significantly more powerful and significantly more scarce. Are you hiring for agency? Are we educating for agency? Are you acting as if you had 10X agency? Grok explanation is ~close: “Agency, as a personality trait, refers to an individual's capacity to take initiative, make decisions, and exert control over their actions and environment. It’s about being proactive rather than reactive—someone with high agency doesn’t just let life happen to them; they shape it. Think of it as a blend of self-efficacy, determination, and a sense of ownership over one’s path. People with strong agency tend to set goals and pursue them with confidence, even in the face of obstacles. They’re the type to say, “I’ll figure it out,” and then actually do it. On the flip side, someone low in agency might feel more like a passenger in their own life, waiting for external forces—like luck, other people, or circumstances—to dictate what happens next. It’s not quite the same as assertiveness or ambition, though it can overlap. Agency is quieter, more internal—it’s the belief that you *can* act, paired with the will to follow through. Psychologists often tie it to concepts like locus of control: high-agency folks lean toward an internal locus, feeling they steer their fate, while low-agency folks might lean external, seeing life as something that happens *to* them.”
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I am wondering why PQCrypto is not in here or in Google's security conference ranking list: jianying.space/conference-ra…

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Alex Biryukov retweeted
1/n I’m really excited to share that our @OpenAI reasoning system got a perfect score of 12/12 during the 2025 ICPC World Finals, the premier collegiate programming competition where top university teams from around the world solve complex algorithmic problems. This would have placed it first among all human participants. 🥇🥇
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"It was a special performance just for this publication, because he (the dog) understands the importance of evidence-based science."
13 Jul 2025
Quantum factoring paper of the year: eprint.iacr.org/2025/1237
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Alex Biryukov retweeted
Join us at DeFi’25: Workshop on Decentralized Finance & Security, Co-located with ACM CCS 2025 on October 17, 2025. Submission deadline: July 21, 2025 (AoE) Thanks to our incredible program committee & chairs for making this happen: @yaish_aviv @christoftorres @alexcryptan @chendaLiu @PulpSpy @jgorzny @0xlf_ @manv_sc @pszalach @mysteryfigure @KaihuaQIN @flotschorsch @zzzihaoli @masserova @dmoroz @ObadiaAlex @chiachih_wu @VeroCEG @KushalBabel @0xFanZhang @lzhou1110 @lzhou1110 @chunghaocrypto …and to our steering committee: @TheWattenhofer @dawnsongtweets @HatforceSec @Daeinar Learn more & submit: defiwork.shop

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CBT workshop deadline extended until 30 June 2025 (AoE) cbtworkshop.org/

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Interesting interview with Tao, especially on AI-assisted theorem proving and Human mathematicians vs AI x.com/lexfridman/status/1934…

14 Jun 2025
Here's my conversation with Terence Tao, one of the greatest mathematicians in history. We talk about the hardest problems in mathematics & physics, and how AI might help us humans to solve them. This conversation was a huge honor for me. I can't quite put it into words, but once again I'm grateful for whatever simulation code resulted in me having the life I do 🙏 To further confirm simulation, podcast length accidentally turned out to be 3:14 (pi=3.141592). But it's not 3:14:15, because the simulation code has some bugs 🤣 Podcast is here on X in full, and is up everywhere else (see comment). Timestamps: 0:00 - Introduction 0:49 - First hard problem 6:16 - Navier–Stokes singularity 26:26 - Game of life 33:01 - Infinity 38:07 - Math vs Physics 44:26 - Nature of reality 1:07:09 - Theory of everything 1:13:10 - General relativity 1:16:37 - Solving difficult problems 1:20:01 - AI-assisted theorem proving 1:32:51 - Lean programming language 1:42:51 - DeepMind's AlphaProof 1:47:45 - Human mathematicians vs AI 1:57:37 - AI winning the Fields Medal 2:04:47 - Grigori Perelman 2:17:30 - Twin Prime Conjecture 2:34:04 - Collatz conjecture 2:40:50 - P = NP 2:43:43 - Fields Medal 2:51:18 - Andrew Wiles and Fermat's Last Theorem 2:55:16 - Productivity 2:57:55 - Advice for young people 3:06:17 - The greatest mathematician of all time
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Alex Biryukov retweeted
The Greeks just loved their word-search puzzles!
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In cryptanalysis never say never.
12 Apr 2025
ChaCha8 will never be broken in a meaningful way (= a way that reduces the security of any real system) [ but academics might say it's broken if there's an attack in 2^200 "operations" and 2^150 "memory" requiring chosen nonces ]
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Alex Biryukov retweeted
[Revised] Exact Formula for RX-Differential Probability through Modular Addition for All Rotations (Alex Biryukov and Baptiste Lambin and Aleksei Udovenko) ia.cr/2025/550

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