Post-quantum @cloudflare

Joined November 2006
113 Photos and videos
Wisdom of the (small) crowd was spot on.
We published zero-knowledge-proofs that we know better quantum circuits for ELDPC. The community has lots of smart people. Some of them will take this as a challenge. How long until as-good-or-better circuits get published?
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Bas Westerbaan retweeted
We published zero-knowledge-proofs that we know better quantum circuits for ELDPC. The community has lots of smart people. Some of them will take this as a challenge. How long until as-good-or-better circuits get published?
12% < 1 month
71% 1 month to 1 year
18% > 1 year
0% dunno
17 votes • Final results
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Bas Westerbaan retweeted
Blog post: "The French have the Quantum Circuits" algassert.com/post/2602 André Schrottenloher just published a preprint showing how to construct quantum ECDLP circuits with costs similar to the ones in our zero knowledge proofs.

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Bas Westerbaan retweeted
LOST IN PQC TRANSLATION SESSION🔥 - Updated state of the PQC transition by Yvan Vanhullebus 🔬 - PQC experiments in Cryptpad by Fabrice Mouhartem 💻 - Discover Merkle Tree Certificates with @bwesterb 🚀 🚨 Take your free(!) seat 🥰 🎟️ Booking: pretix.eu/passthesalt/2026/
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I think Scott Aaronson's previous blog posts were abundantly clear already, but well... here we have it.
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"See, some of the most reputable people in quantum hardware and Q error-correction—people whose judgment I trust more than my own on those topics—are now telling me that a fault-tolerant quantum computer able to break deployed cryptosystems ought to be possible by around 2029."
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Bas Westerbaan retweeted
🟥 red button: elliptic-curve crypto until 2050, secure implementation, side channel-safe, meaningfully formally verified etc. 🟦 blue button: PQC (your favorite) but newly vibe-coded, at least matches the test vectors no button for hybrid 😈
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Bas Westerbaan retweeted
Blog post: "The predictable failure of the QDay Prize" algassert.com/post/2601

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"As always, I'm skeptical, but I find myself spooked by these results." "[To wait] you would need to be confident that quantum computing won't happen. [...] While I'm still skeptical about fast progress, I don't think it's reasonable to be confidently skeptical anymore."
New Quantum Computing Landscape for 2026 from @sejaques: sam-jaques.appspot.com/quant…
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For clarity: these are quotes of @sejaques
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meant to write such a post, but now wont have too, thanks @FiloSottile words.filippo.io/128-bits/
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Bas Westerbaan retweeted
Understanding the quantum threat to today’s encryption: for #WorldQuantumDay, Bas Westerbaan explains why the 2029 post-quantum deadline is becoming very real on ThisWeekinNET.com. Watch the conversation youtu.be/DHIyAbLuQyg
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I'm speaking next week at ICMC next week. Bill Rutledge suggested the title back in December. Quite prescient indeed—I didn't realise timelines would be this hot right now!
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By the way, I'll be in DC from Sunday to Thursday morning in case anyone wants to have a chat in person.
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Bas Westerbaan retweeted
Apr 10
Libsodium 1.0.22 has been released. And yes, if terrifying, world-ending quantum computers are keeping you up at night, it now includes crypto_kem_* (mapping to XWing) to soothe your post-quantum anxieties. libsodium.org

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Nice surprise: Dutch @ncsc_nl supports PQ kex! Ahead of the pack in government organisations worldwide.
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Regular reminder we're crowd-sourcing real-world deployment at scale of "fancy cryptography": cryptography beyond basic encryption / signatures. Vast majority is not post-quantum yet. github.com/fancy-cryptograph…
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