Software engineer at @anthropicai interested in cryptography, security, privacy, and machine learning.
San Francisco
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This P-256 Birthday in mid-August made me crave chocolate-covered strawberries and gave me a hunch.
Look who spoke at Crypto’97 within a week of P-256 being generated: iacr.org/conferences/c97/c97…
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Steve Weis retweeted
plot twist the nsa didn't backdoor p-256 they backdoored time itself
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Steve Weis retweeted
we filed the first complete, machine-verified differential construction for 39 round SHA-256 applying a new technique to ePrint 2026/1120 allowing to take it further than the paper did.
just 0.14 bits below current best generic search submission under the same hashsmash cost model. @cyberaxe join forces?
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CLAUDE FOUND THE SEEDS
anthropic.com/research/ecdsa…
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In 1996, Ian Goldberg and Dave Wagner had a good example of rewinding a PRNG seed to time of day in Netscape: people.eecs.berkeley.edu/~da…
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I spent a good amount of time digging. I found ex-NSA employees, older cryptographers, and old documents.
I had four independent people give the "Jerry and Bob deserve a raise" story -- including Jerry Solinas.
Turns out nobody was right!
saweis.net/posts/nist-curve-…
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This is some background from @matthew_d_green : blog.cryptographyengineering…
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As a treat, Claude also reverse engineered the NBS's 1977 DES S-box test vectors and determined that it was generated on a PDP-11 Unix V6 using rand() .
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Official reenactment:
piped.video/watch?v=eOQfNT6J…
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One year ago, I would have thought replacing an entrenched source-control vendor with homegrown source control and code review systems was a terrible idea. I saw these projects take years before.
It was done in 5 months and is supporting 10X the volume.
anthropic.com/engineering/re…
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Steve Weis retweeted
I was curious about a question: how much cryptanalytic work have human beings done on various problems, and how much AI inference does that represent? So I asked Claude and Astra to measure. bitsofwork.org
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Steve Weis retweeted
eminder: Real World Crypto 2027 contributed-talk submissions are due Oct 15. If you've got new applied-crypto work, deployment lessons, or results the community should hear, send a 3-page abstract. Seattle, Apr 5-7.
CfP: rwc.iacr.org/2027/contribute…
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