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The OpenHands team used Quint to debug a stubborn race condition. It told them their first fix wasn't good enough before they shipped it.

AI can write the code. The bottleneck is now understanding what that code actually does.

How a DeFi exploit hid from every standard correctness check

The Massachusetts Platform for Legislative Engagement (aka MAPLE, at mapletestimony.org ), an initiative of Partners in Democracy – Education, is a free public platform for reading and submitting testimony to the Massachusetts state legislature. It’s a little like a social network, but your feed consists of bills and voter testimony. MAPLE exists to encourage and simplify civic engagement, giving

The Interchain Foundation follows up today with the latest installment of its monthly treasury snapshot updates, as per the latest… Continue reading on The Interchain Foundation »

We used Quint to analyze the MonadBFT consensus protocol, formally specifying definitions and pseudo code, validating lemmas and theorems through simulation, and reproducing scenario diagrams as executable runs.

Quint is becoming its own company, spinning out of Informal Systems to make trust a first-class property of how systems are designed and built.

After six years, Informal returns to its founding question.

Last month, Hypha member Udit and I attended Atmosphere Conf . We had a great time! Hanging out with people in person confirmed what we had been seeing across our feed for months: the Atmosphere is a vibrant and growing ecosystem we’re excited to be a part of. We made our first foray into the protocol in February with spores.garden , our digital garden game , learning how to write lexicons and e

We have modeled the Byzantine Generalized Lattice Agreement algorithm in Quint and found two bugs in the SAFE predicate

Let’s say you wanna watch a movie in theatres. A good movie please, an artsy flick with limited distribution, ideally subtitled, in a space with no teenagers and a lobby cocktail bar. You ask your AI assistant: “where can I watch an artsy film in an indie theatre in Toronto this weekend?” Your assistant does a couple of web searches and comes back with some suggestions. One of them appeals to you,

Two exploits and one root cause. The rules developers never wrote down.

We wrote a Quint spec for the Faerie-Gold attack in the Zerocash protocol, plus a ZCash-like fix.

Projects move at varying speeds: some shift rapidly from ideation to product while others take a slower and more thoughtful approach. For Rook , Hypha’s new agentic knowledge management tool, we’ve been deliberately considered about how and why we move into the AI space. This is not only because the market is a little saturated with LLM-esque tools, but also because we wanted to offer something th

We used to build trust and understanding while coding. With LLMs, we need a new process.

Verifying zero-knowledge proofs and cross-chain privacy for shielded transactions.

“Are things really gettin’ better, like the newspaper said? What else is new my friend, besides what I read? Can’t find no work, can’t find no job, my friend Money is tighter than it’s ever been Say man, I just don’t understand What’s going on across this land” – Marvin Gaye, “What’s Happening Brother” On March 12, 1711, Joseph Addison (1672-1719) and Richard Steele’s (1671-1729) seminal publi

A technical guide to PeerDAS security architecture for Ethereum protocol developers.

Recent Dripline posts have covered what can be built on top of cryptographic hash functions: important concepts like data integrity and content provenance. Having the ability to uniquely refer to and verify an exact piece of data is crucial to building reliable digital content systems. But this can only take us so far. How can we keep track of an image when it’s been converted to a different file

In fact, we built digital gardens for everyone on ATProto! Yours already exists—it’s just waiting for you to plant something. Check out your corner of the internet here . Digital gardening is about curating and contextualizing ideas on your own personal site. There are already ATProto apps for posting short-form thoughts, for writing longer pieces, for posting photos and videos, for streaming an

We used Quint Connect and AI to increase test coverage and find a bug in Emerald

Photo by Marko Stojanovic via Stocksy Over the holiday break, I headed to Vancouver Island where I was born and raised to spend the holidays with my extended family. And while I didn’t bring my laptop, I did take a copy of Empire of AI so that I could finish it while eating Christmas cookies and relaxing. Despite not being your usual vacation read, it’s a great book and recommended for

“Content provenance” is an emerging set of techniques that Hypha has been working with, often in the context of mis/disinformation. Instead of asking “Is this content fake?” content provenance systems ask a narrow, more technically precise question: “Where did this come from, and what happened to it?” By cryptographically binding media to devices, creators, and workflows, provenance turns content

Here at Hypha, we talk about cryptography and digital trust a lot. We keep running into all these different terms in articles online, in your Bluesky posts, in our group chats. What’s the difference between integrity and authenticity? Privacy and security? We keep misusing them, and you do too. So we thought it’s time to iron out some definitions for all of us. Each of these terms refer to how d