Dan Guido

Our team won the runner-up prize of $3M at DARPA’s AI Cyber Challenge, demonstrating Buttercup’s world-class automated vulnerability discovery and patching capabilities with remarkable cost efficiency.

Trail of Bits founder Dan Guido establishes a $2,500 scholarship at his alma mater, Mineola High School, to recognize students who demonstrate the hacker spirit through self-driven learning, creative problem-solving, and unconventional technological exploration. The scholarship celebrates tomorrow’s security innovators who push boundaries and think differently about technology.

This post describes a sophisticated social engineering campaign using Zoom’s remote control feature and provides technical solutions to protect organizations against this attack vector.

The $1.5B Bybit Hack demonstrates how the Era of Operational Security Failures has arrived, and most cryptocurrency companies are not prepared for its implications.

Trail of Bits has qualified for the final round of DARPA’s AI Cyber Challenge (AIxCC)! Our Cyber Reasoning System, Buttercup, placed in the top 7 out of 39 teams competing in the semifinal round held at DEF CON 2024. Competition Overview The AIxCC semifinal featured a series of challenges based on real-world software, including nginx, […]

With DARPA’s AI Cyber Challenge (AIxCC) semifinal starting today at DEF CON 2024, we want to introduce Buttercup, our AIxCC submission. Buttercup is a Cyber Reasoning System (CRS) that combines conventional cybersecurity techniques like fuzzing and static analysis with AI and machine learning to find and fix software vulnerabilities. The system is designed to operate […]

We’re thrilled to announce that Trail of Bits will be competing in DARPA’s upcoming AI Cyber Challenge (AIxCC)! DARPA is challenging competitors to develop novel, fully automated AI-driven systems capable of securing the critical software that underpins the modern world. We’ve formed a team of world class software security and AI/ML experts, bringing together researchers, […]

We’re proud to announce that iVerify is now an independent company following its four-year incubation at Trail of Bits. Originally developed in-house to ensure that our personal phones, which store data essential to our work and private lives, were secured to the standards of security professionals, iVerify quickly showed that it could be valuable to […]

One of the biggest challenges for blockchain developers is objectively assessing their security posture and measuring how it progresses. To address this issue, a working group of Web3 security experts, led by Trail of Bits CEO Dan Guido, met earlier this year to create a simple test for profiling the security of blockchain teams. We […]

Dan Guido, CEO The second meeting of the Commodity Futures Trading Commission’s Technology Advisory Committee (TAC) on July 18 focused on the effects of AI on the financial sector. During the meeting, I explained that AI has the potential to fundamentally change the balance between cyber offense and defense, and that we need security-focused benchmarks […]

In March, I joined the Commodity Futures Trading Commission’s Technology Advisory Committee (TAC), helping the regulatory agency navigate the complexities of cybersecurity risks, particularly in emerging technologies like AI and blockchain. During the committee’s first meeting, I discussed how the rapidly changing and public nature of blockchain technology makes it uniquely susceptible […]

Smart contract authors can now express security properties in the same language they use to write their code (Solidity) and our new tool, manticore-verifier, will automatically verify those invariants. Even better, Echidna and Manticore share the same format for specifying property tests. In other words, smart contract authors can now write one property test and […]

As a company, we believe Black lives matter. In the face of continued police brutality, racial disparities in law enforcement, and limited accountability, we demand an end to systemic racism, endorse restrictions on police use of force, and seek greater accountability for police actions. We believe police misconduct, militarization of police, and unchecked abuse of […]

The Trail of Bits Winternship is our winter internship program where we invite 10-15 students to join us over the winter break for a short project that has a meaningful impact on information security. They work remotely with a mentor to create or improve tools that solve a single impactful problem. These paid internships give […]

At Trail of Bits, we’ve all been working remotely due to COVID-19. But the next Empire Hacking event will go on, via video conference! When: April 14th @ 6PM How: RSVP via this Google Form or on Meetup. We’ll email you an invitation early next week. Come talk shop with us! Every two months, Empire […]

Voatz allows voters to cast their ballots from any geographic location on supported mobile devices. Its mobile voting platform is under increasing public scrutiny for security vulnerabilities that could potentially invalidate an election. The issues are serious enough to attract inquiries from the Department of Homeland Security and Congress. However, there has been no comprehensive […]

The Ethereum Name Service (ENS) contract recently suffered from a critical bug that prompted a security advisory and a migration to a new contract (CVE-2020-5232). ENS allows users to associate online resources with human-readable names. As you might expect, it allows you to transfer and sell domain names. Specific details about the bug were in […]

The Trail of Bits SummerCon Fellowship program is now accepting applications from emerging security researchers with excellent project ideas. Fellows will explore their research topics with our guidance and then present their findings at SummerCon 2019. We will be reserving at least 50% of our funding for marginalized, female-identifying, transgender, and non-binary candidates. If you’re […]

Remember last December’s Empire Hacking? The one where we dedicated the event to sharing the best information about blockchain and smart contract security? Let’s do that again, and let’s make it a tradition; a half-day mini conference focused exclusively on a single topic every December. On December 12, please join us at Buzzfeed’s NYC offices […]

We wanted to make up for missing the first three Devcons, so we participated in this year’s event through a number of talks, a panel, and two trainings. For those of you who couldn’t join us, we’ve summarized our contributions below. We hope to see you there next year. Using Manticore and Symbolic Execution to […]

We came away from ETH Berlin with two overarching impressions: first, many developers were hungry for any guidance on security, and second; too few security firms were accessible. When we began taking on blockchain security engagements in 2016, there were no tools engineered for the work. Useful documentation was hard to find and hidden among […]

We have a soft spot in our hearts for SummerCon. This event, the longest-running hacker conference in the US, is a great chance to host hacker friends from around the world in NYC, catch up in person, and learn about delightfully weird security topics. It draws a great crowd, ranging from “hackers to feds to […]

Two years ago, when we began taking on blockchain security engagements, there were no tools engineered for the work. No static analyzers, fuzzers, or reverse engineering tools for Ethereum. So, we invested significant time and expertise to create what we needed, adapt what we already had, and refine the work continuously over dozens of audits. […]

Two weeks ago, we were engaged by CTS Labs as independent consultants at our standard consulting rates to review and confirm the technical accuracy of their preliminary findings. We participated neither in their research nor in their subsequent disclosure process. Our recommendation to CTS was to disclose the vulnerabilities through a CERT. Our review of […]

What a roller coaster of a year! Well, outside of our office. Inside, 2017 was excellent. We published novel research that advanced – among others – the practices of automated bug discovery, symbolic execution, and binary translation. In the process, we improved many foundational tools that an increasing number of security researchers will come to […]