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A GKR tutorial: vitalik.eth.limo/general/2025/1…

Our longest-ever hackathon is a wrap: 66 hours of building—that’s 1.5 work weeks compressed into one weekend 💥 At our European Defense Tech Hackathon in London, 150+ participants across 26 teams tackled some of today’s most urgent security challenges. Three projects rose to the top: 🥇 1st Place — Kolu: A drone identification friend-or-foe (IFF) system to help Ukrainian forces on the battlefield by Pia Park & Enrico Bottazzi 🥈 2nd Place — Interceptor: A high-speed Shahed interceptor—with a 1:3 real-life prototype built over the weekend by Thomas Gordon, Saksham Aggarwal, Vedaangh Rungta, Amir Battye 🥉 3rd Place — Sparrow Scorpion: A system to detect and disrupt fibre optic drones by Laura Silaja, Arthur Hurnell, Michal Karlubík Huge thanks to our jury, including Karl Eze, Matt Odell, Richard Pass, Nino Lindenberg, David Cledon, Leo Geer, and our delegation of Ukrainian soldiers And huge thanks to all our partners—your support made this possible: STARK — Our key partner, leading the challenge track on Mission-Effective Software for Unmanned Systems Our hackathon partners, Quantum Systems @quantumdrones, ARX Robotics, and our host, the Honourable Artillery Company Alongside: Resilience Media, @SurrealDB, Eyeson, @delian_ai, AIRQIT, Synteza AI, Pilotix, DroneAid Collective, @sotalikesfuture, the Ukrainian MoD @DefenceU, and @inflectionxyz The most important thing now: keep building after the hackathon! These prototypes can make a difference—and even save lives. And as EDTH, we’re here to help you take them further! 🚀

1/ 🚨 Exciting collab update! @electisec is auditing the world’s first implementation of an EIP-7503-inspired zero-knowledge proof-of-burn circuit — powering the WORM 🪱 experiment.