Joined August 2009
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33 Photos and videos
May 18
Formal verification is becoming for developers what coding became for everyone.
May 18
Many people have claimed that with AI-assisted bug finding, secure code (and hence trustless anything) will be impossible.
I have a much more optimistic take, and AI-assisted formal verification is a major part of the reason why:
vitalik.eth.limo/general/202…
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Daejun Park retweeted
May 18
Many people have claimed that with AI-assisted bug finding, secure code (and hence trustless anything) will be impossible.
I have a much more optimistic take, and AI-assisted formal verification is a major part of the reason why:
vitalik.eth.limo/general/202…
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Daejun Park retweeted
May 8
CLAP lets you write a ZK circuit directly in the Lean proof assistant. The compiler lowers it to a constraint system, with soundness and completeness guaranteed by construction.
Properties proved at the source level carry through to R1CS.
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Daejun Park retweeted
May 8
This is a great illustration of why "generative AI finding security bugs everywhere" is a non‑equilibrium phenomenon. Today, there's lots of software out there that wasn't built under agentic scrutiny.
Going forward, pretty much all software, including smart contracts, will be subjected to increasingly sophisticated and thorough agent audits before deployment – which will hopefully squash these types of bugs ahead of time.
(h/t @eddylazzarin)
May 7
With the help of Claude Mythos Preview, the Firefox team fixed more security bugs in April than in the past 15 months combined.
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Apr 29
We've been exploring whether AI security agents can replace human experts.
Our takeaway so far: not yet.
For price manipulation, one of the most complex DeFi attacks, generating exploit PoCs is still a bottleneck.
Would love your thoughts.
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Daejun Park retweeted
Feb 4
1/ Moltbook is a great experiment, but it brings up a lingering question: How do we secure vibe coded applications? The answer, hopefully, is to have some AI help secure code written by AI, but the specific details are still an active question.
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15 Dec 2025
Recent Balancer yETH exploits share a common pattern: tiny numerical edge cases becoming real vulnerabilities.
We outline the mechanics and argue for a missing defense: runtime checks on precision invariants.
This needs to be a first-class design requirement in DeFi.👇
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15 Dec 2025
8/ As DeFi math gets more complex, this line of defense becomes essential.
Even if an unforeseen numerical subtlety slips through, the protocol should never enter a state that violates its economic invariants.
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11 Dec 2025
The future of DeFi security:
Not “did we catch every bug?”
but “can the system block unsafe behavior by design?”
Core invariants runtime guardrails = spec is law.
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Daejun Park retweeted
22 Oct 2025
We’re excited to share our 2025 State of Crypto report.
This year’s story: the maturation of the crypto industry — with growing institutional adoption, the rise of stablecoins, better infrastructure, new consumer experiences, and long-awaited regulatory clarity.
Read the full report → a16zcrypto.com/posts/article…
Here are the biggest trends of 2025…
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