Want a straight read on your product, go-to-market, or fundraising plan? Shauli Rejwan (@shap0w), Managing Partner at @masterkeyvc and co-founder of Web3 Devs Underground, holds six 20-minute 1:1 sessions. Sun 25 Oct, 14:00-16:00, @sncentral_ Tel Aviv. Free. Apply by Sun 18 Oct.

You're all invited to Office Hours on Sun 25 Oct in Tel Aviv: 20-min 1:1s with Eli Ben Sasson, Dror Avieli, Arkady Karpman, Ehud Naos and Shauli Rejwan. Bring a real question; the hosts pick who they meet. Free, apply by 18 Oct. office-hours-landing.vercel.…

Yehuda Lindell joins the special panel that closes Mid-Chain. Mon 26 Oct · 17:00 · Senate Hall, Ben-Gurion University After a full day of talks on proof of useful work, EIP-1559, restaking, post-quantum migration and governance. Free, by approval 👉 luma.com/rzaklefv?utm_source…

Multisig in Practice | Web3 Devs Underground Monthly Meetup xitter.cf/i/broadcasts/1oJMvNkPN…

NEXT MEETUP IN TEL AVIV 1. @_benkaufman workshops multisig with @SparrowWallet. 2. @boazeb on building @summocash, his 2-of-3 multisig app. 🗓️ Wednesday - 23/9/2026 📍@sncentral_ (28 Lilienblum St.) Learn to keep your crypto safe: luma.com/o6gh384v

Open-Kritt: AI Agents That Find Real Vulnerabilities xitter.cf/i/broadcasts/1pKdRDazg…

@ControlZ_1337 open-sourced his AI agent that found a $250,000 bug, and it has already passed 1,000 GitHub stars and secured hundreds of thousands of dollars. Next week on the Underground, he'll show you how it works: Register here: luma.com/eo69kght?tk=kIt76F 📅 Wednesday, August 19 🕐 10:00 EDT · 16:00 CET · 17:00 IDT 📍 Live on YouTube

Is Your Bitcoin Safe? ColdCard's RNG Failure and How Not to Lose It All xitter.cf/i/broadcasts/1rGmqqPvB…

🇮🇱 $ILS trading is overwhelmingly global → 88% of spot & forward activity involved a non-resident. We are now LIVE at @sncentral_ 👇

Raised in USD, but spending ILS? Israeli startups have lost ~30% of their runways in two years. A Practical Guide to Protecting Your Runway from Currency Volatility (FX & Crypto) → Join us LIVE: 29 July at @sncentral_ in Tel Aviv 🇮🇱 → Speakers: Tal Raz (@AltshulerShaham) + @OfirEliasi Register here: luma.com/atpdscdn?tk=EfVtIe

AMM design is being rethought from the ground up, and 1inch Aqua is the clearest signal of where on-chain trading infrastructure is heading. Join us for a technical deep-dive into 1inch's next-generation liquidity protocol: how shared liquidity works, and what it unlocks for LPs, DeFi users, and builders. 🎤 Tanner Moore (@tanz0rz), Technical Account Manager at @1inch What we're covering: • Where modern AMM design falls short: fragmented liquidity, idle capital, LP tradeoffs • What Aqua is, and which of those assumptions it challenges • Shared liquidity in practice: capital efficiency and what it means for LPs • What the design unlocks for swappers • Building on top of or integrating with Aqua If you're building DeFi applications, providing liquidity, or want to understand where on-chain trading infrastructure is heading, this session is for you. 📅 Wednesday, July 15th 🕐Time: 10:00 EDT | 16:00 CET | 17:00 Israel 📍Where: Streaming live on X, YouTube & LinkedIn Register NOW: luma.com/7p4xrxd7 Powered by @MasterkeyVC

AI agents are signing transactions, holding keys, and moving real funds, usually with no guardrails at all. That's a brand-new attack surface, and your current security model wasn't built for it. Join us THIS WEDNESDAY for a deep technical session on securing autonomous agents, with Kevin Jones (@cryptomastery_), founder of @1clawAI and DevRel at @edgeandnode / @graphprotocol. What we're covering: • Why AI agents are a new class of attack surface • Giving an agent a leash (policy enforcement), a wallet (HSM-backed key custody), and a safety belt (pre-execution guardrails) • How @1clawAI secures the agent economy at scale • Practical patterns for builders shipping agents that touch real funds 🗓 Wednesday, June 17 🕔 17:00 IDT | 16:00 CET | 10:00 EDT 📡 Live on X, YouTube & LinkedIn If you're building or deploying onchain AI agents, this one goes straight to the core. Register: luma.com/web3devs_undergroun…

@or_sattath (BGU) opened with the optimistic side: public quantum money and one-shot signatures (Amos et al., Best Paper at Crypto), enabling "prudent contracts" and a Bitcoin upgrade path that eventually retires mining. @DesheShai followed with the migration plan. Front-running during the broadcast-to-confirmation window is the real near-term surface. In flight: BIP-360 (soft-fork ramp for new signatures), cryptographic canaries as on-chain tripwires, Lifted FawkesCoin (LFC) for recovering legacy and lost addresses, and BIP-361 (Jameson Lopp et al.) as the roadmap. Thanks to @CatoNetworks for hosting us into their breathtaking offices, @MasterkeyVC, and Mamram Alumni Association. Media partners: QUBIT-IL, @B7Blockchain, and @bengurionu. 📺 Recording: youtube.com/watch?v=KEsmxB2-…

Quantum computers - the biggest threat to Bitcoin yet? 🚨 We are LIVE with Prof. @or_sattath and Dr. @DesheShai. Watch NOW right here on X ⤵️ xitter.cf/i/broadcasts/1dGYllLLW…

Most people think the quantum threat to Bitcoin is simple: a quantum computer breaks the encryption and it's over. The truth is much more complex. We're proud Media Partners for @B7Blockchain's upcoming event on the topic. → Happening ONLINE in just TWO DAYs. luma.com/zky4uq3u?tk=tPf26Y What to expect → Dr. Shai (Deshe) Wyborski @DesheShai (expert in quantum cryptography, co-developer of the Lifted FawkesCoin protocol) will break down: - Why Bitcoin's decentralization is both its strength and its quantum vulnerability - Post-quantum migration: what's already being built (SHRIMPs, @StarkWareLtd's QSB, Commit-Delay-Reveal) - The real timeline and what it means for the network today Special guest: Prof. @or_sattath, one of the world's leading researchers in quantum cryptography and co-developer of the LFC protocol alongside Dr. Wyborski.

During our last live event, @buda_kyiv and Stephen Ajayi from @hackenclub broke down what happens when prompt injection meets DeFi agents. Here's 7 things from that session worth building into your architecture:

AMMs are ground zero for MEV → Sandwich attacks, front-running, and the hidden tax on every DeFi trade, all enabled by how transactions get ordered. But what if ordering itself could be fair by default? Join us THIS WEDNESDAY for a deep technical dive into CLVR, a mechanism that rethinks AMM transaction sequencing and eliminates sandwich attacks by design with @NChemaya of @BenGurionUni. What we're breaking down: • CLVR ordering vs. first-come-first-served • The anatomy of sandwich attacks and why AMMs are structurally vulnerable 🥪 • The math: batch auctions, uniform clearing prices, fairness/latency/throughput tradeoffs • How CLVR stacks up against commit-reveal, encrypted mempools, and SUAVE • Design implications if you're building an AMM, aggregator, or intent-based system 📅 Wednesday, May 13th 🕐 10:00 EDT | 16:00 CET | 17:00 IDT If you're building or auditing DeFi protocols, this one goes straight to the core. Register: luma.com/prhwjekn

🚨 AI is entering DeFi, and so are entirely new attack vectors. Are your smart contracts secure, or are you waiting to get rekt? 💥 Join us THIS WEDNESDAY for Under the Hood of Web3 Security hosted by @Web3_Devs × @hackenclub ! 🛡️ 🎤 Featuring @buda_kyiv (Founder @hackenclub ) 👾 Hands-on Workshop: Prompt Injection Meets DeFi with Stephen Ajayi! We are tearing down: 🔍 The Audit Process 💥 Real-world Exploit Anatomy 🧠 The Attacker Mindset 📅 April 29th | 10:00 AM EDT 🎟️ Secure your spot NOW: luma.com/sx1xj8ur