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@Web3_Devs @zama @RitrekRecovery Great time to build

We are excited to invite you to join us for another Web3 Devs Underground event! 🔐₿ Two sessions. Two frontiers. One event. @Web3_Devs × @zama x @RitrekRecovery powered by @MasterkeyVC 📅 March 11th | 17:00 Israel Time | 16:00 CET | 10:00 EDT 📍 Live on X, YouTube & LinkedIn Register Here: luma.com/78qezjr0 Session 1 - FHE & Confidential Smart Contracts @poppyseedDev (Aurora Poppyseed), DevRel at @zama, breaks down how Fully Homomorphic Encryption (FHE) is bringing real confidentiality to the EVM - running computations on encrypted data without ever decrypting it. From private transfers to blind auctions, this is what on-chain privacy actually looks like. Session 2 - TimeLock Recovery for Bitcoin Backup @oren_z0 (Oren Zomer), Founder at @RitrekRecovery, walks through structured wallet recovery using Bitcoin Script - primary to secondary wallet, and what BIP-128 makes possible. Self-sovereign custody, done right. Two of the most technically dense topics in crypto infrastructure - in one session. Whether you're building on EVM or working with Bitcoin Script, this one's for you. 🔗 See full calendar: lnkd.in/dPBqaEMc @MasterkeyVC @SHAP0W @Amit_Masterkey @Web3_Devs @ELuttenberg789 @AlonKivity @al23xyz #Web3 #Bitcoin #FHE #Zama #ZeroKnowledge #BitcoinScript #Cryptography #Web3Dev #Blockchain #DeFi #SmartContracts #MasterkeyVC

The Hitchhiker's Guide To The Web3 Builder In The Middle East | H1 2026 | Powered by @MasterkeyVC Dear friends and colleagues, We have been working tirelessly to produce top-tier technical content and connect industry leaders in the Web3 space to amplify and accelerate innovation. We are excited to invite you to take part in person or online in some of the initiatives we are creating: 📅March: 1️⃣ @Web3_Devs Underground - Online Meetup (March 11, 2026) Founders, C-levels, and technical speakers meet monthly to support the vision: “By Builders, For Builders.” 👉 Information & Registeration: luma.com/78qezjr0 2️⃣ Mid-Chain Conference Side Events: * Web3 Devs Underground Meetup - Tel-Aviv (March 15, 2026) Founders, C-levels, and technical speakers meet monthly to support the vision: “By Builders, For Builders.” 👉 Information & Registeration: luma.com/afl2bzer * Mid-Chain VIP Dinner, Be'er Sheva (March 16, 2026) An intimate dinner for our speakers, partners, and close network to relax and connect on a deeper level. 👉 Request Access: Contact Amit Shilo at shilo@masterkey.vc 3️⃣ Main Event: Mid-Chain Conference (March 16, 2026) An academic conference focused on DeFi, cryptography, and innovation. We are gathering 150 of the brightest minds in Computer Science and Economics for a premier summit. Confirmed keynotes include Prof. @dahlia_malkhi and Prof. @JulienXPrat 👉 Apply to Speak: [docs.google.com/forms/d/e/1FAI…] 👉 More Info: mid-chain.com 4️⃣ EthCC: Masterkey VC Breakfast With Friends (March 16, 2026) Breakfast in Cannes with industry leaders and top technical minds 👉 Information & Registeration: luma.com/vtkh3515 📅April 1️⃣ Executive Delegation: Israeli Innovation Ecosystem Tour Connecting global friends with the local ecosystem (Office-Hours & Meetup - ping us to get involved) Token2049 Dubai 2️⃣ Pushing the Boundaries: Web3 Devs Underground @ TOKEN2049 Dubai (April 28, 2026) Our physical, global, in-person conference during the Dubai flagship week! 👉 Register: luma.com/q9fga8om Whether you are a researcher, a builder, or an investor, we’d love to see you at one of these events! 📅May Web3 Devs Underground - Physical meetup Web3 Devs Underground - Online event 📅June Last gathering before summer break ⏪ What You Might Have Missed (Past Events) January: * Online Webinar #14 | The $250K Bug: When AI Finds What Humans Can't (Jan 14, 2026) - youtube.com/watch?v=j7IdAN… * Monthly Meetup of the Web3 Developers Underground community (Jan 21, 2026) - youtube.com/watch?v=krXXwb… * Part 2: Office Hours with Steven Goldfether, Co-Founder & CEO, OFFCHAIN LABS (Powering Arbitrum) (Jan 21, 2026) - luma.com/tj5wz65o February * The Israeli Companies Forum Special Conference: "When We Unite, Israel Wins" (Feb 3, 2026) - luma.com/31iv9l9r * Online Event | Better Payments with Better Data | Web3 Devs underground (Feb 4, 2026) - youtube.com/watch?v=vx_ICT… @MasterkeyVC @SHAP0W @Amit_Masterkey @Web3_Devs @ELuttenberg789 @AlonKivity @al23xyz

Mark your calendars! February 4th we are going live with @Web3_Devs to show how data infra can improve onchain payments. Real-time settlement is only possible with real time infra. Sponsored by @MasterkeyVC luma.com/fbof4ysn?tk=vr…

🚀 The entrepreneurship lessons behind Arbitrum + Blockchain in Space Two frontier talks: Steven Goldfeder (@sgoldfed, Co-Founder & CEO @Offchain Labs - powering @Arbitrum) shares the 10 most important lessons from building Ethereum's leading Layer 2 solutions Amir Yahalom (@am_ylm, Founding Engineer @SpaceComputerIO ) explores blockchain consensus in space - where latency is measured in light-minutes and physics rewrites the consensus rules 📅 Wednesday, January 21st 🕕 18:00 (Israel Time) 📍 Online + @CheckPointSW Offices, Shlomo Kaplan St 5, Tel Aviv 👉 Register: luma.com/l976v29i Our first physical meetup of 2026 - from scaling Ethereum to orbital mechanics. Powered by @MasterkeyVC Hosted by @Web3_Devs & @CheckPointSW #Arbitrum #Layer2 #Ethereum #SpaceTech #Blockchain #Web3 #TelAviv #IsraelTech #TechTLV #Web3Community @AlonKivity, @al23xyz, @ELuttenberg789, @Amit_Masterkey, @SHAP0W

🎙 Cryptic Talks with @ArcanumVentures x @tbvxyz x @MasterkeyVC! 🎙 Web3 VC Outlook for 2026: What's Hot vs. What's Not 🗓 Date: Thursday, January 15th ⏰ Time: 02:00 PM UTC / 03:00 PM CET Host: @pauli_speaks, CBDO at Cryptic Guests: ➖️ @MELOWILD, Co-founder at Arcanum Ventures ➖️ @TobiasTBV, Co-founder & General Partner at TBV ➖️ @SHAP0W, Managing Partner at Masterkey Link: x.com/i/spaces/1LyGB… Set a reminder, tune in live, and be part of the discussion this Thursday. Don't miss it!

Hot Update!!!🥳 See you Today! 🤖 The $250K Bug: AI Security Research Meets Bug Bounties Kicking off 2026 with two game-changers in Web3 security. Gabriel Balko, a top Security Researcher (Known as @ControlZ_1337), recently earned a $250,000 bug bounty - the highest ever awarded for a vulnerability discovered using AI. @MitchellAmador, CEO of @immunefi (The leading Web3 bug bounty platform), joins to share insights on how bug bounty programs work and what this AI breakthrough means for the industry. What happened?  • AI agent found a critical vulnerability (preventing $500M+ in potential losses) • 10 High/Critical bugs discovered in just 3 months • Research that would take a year manually - done in a day • 10,000x faster than traditional security research Join us for a double session: Part 1 – Mitchell Amador: Bug Bounties in Web3 ✅ How bug bounty programs work in crypto ✅ What makes a vulnerability worth $250K+ ✅ Getting started in Web3 security research ✅ AI's impact on the bug bounty landscape ✅ Industry insights from Immunefi Part 2 – Gabriel Balko: The AI Discovery ✅ How the AI agent was built ✅ Translating human security intuition into automation ✅ Real results and stopped attacks ✅ Technical approach and tools 📅 Today!!! (Wednesday, January 14, 2026) 🕔 17:00 Israel Time (15:00 CET · 08:00 EST) 🌐 Online & Free 🎟️ Register: luma.com/m69hd5sn 📺 Live on YouTube: youtube.com/watch?v=j7IdAN… This is where AI-powered security meets real-world bug bounties. 🔥 Powered by @MasterkeyVC 👾 Hosted by @Web3_Devs #AI #CyberSecurity #BugBounty #Web3 #SecurityResearch #MachineLearning #Blockchain #InfoSec #AIResearch #Web3Security #CryptoSecurity #Immunefi #Automation @AlonKivity @al23xyz , @ELuttenberg789, @Amit_Masterkey , @SHAP0W

🤖 The $250K Bug: When AI Finds What Humans Can't Opening 2026 with @ControlZ_1337 sharing how his AI agent earned the highest bug bounty ever awarded for an AI-discovered vulnerability 🎟️ Register: luma.com/m69hd5sn 🧠 What You'll Learn: • How AI found a $500M+ vulnerability • Building security research automation • 10,000x faster than manual research • 10 High/Critical bugs in 3 months • The future of AI-powered security 📅 When: Jan 14, Wednesday 🕔 17:00 Israel Time 🕙 15:00 CET · 08:00 EST 🌐 Where: Online & Free 🎟️ Register: luma.com/m69hd5sn 📺 Live: @web3devsunderground" target="_blank" rel="nofollow noopener">youtube.com/@web3devsunder… 🔥Powered By: @MasterkeyVC 👾Hosted By: @Web3_Devs #AI #BugBounty #Web3Security #CyberSecurity #InfoSec #Web3 #Blockchain #AIResearch #SecurityResearch #Crypto

Office Hours! We are excited to announce an exclusive Office Hours session with @sgoldfed , Co-Founder & CEO of @Offchain Labs (powering @arbitrum ). This is a unique opportunity to engage with one of the leading entrepreneurs in the space in person. Please note that slots are strictly limited, and we are curating attendees to facilitate high-value conversations. Luma link: luma.com/ssc2kw53 To apply for a slot, please visit: masterkey.fillout.com/t/cngUbzJnuQus Details: - Location: Tel Aviv (Exact location shared with approved attendees) - Date: January 7th, 2026 (10:00 AM - 4:00 PM) - Deadline: Applications close on Monday evening. A big shout out to our portfolio company Eureka Labs for their collaboration.

Web3 Devs Underground × Offchain Labs × Rapyd × Backed.Fi × Ethereum Foundation x.com/i/broadcasts/1…

🚨 Web3 Devs Underground - End of Year Special 🚨 Join us for an epic finale featuring Ethereum's scaling pioneers and DeFi leaders alongside Top Israeli Fintech pride! 🔗 RSVP: luma.com/2sejr2tg 🎤 SPEAKERS: • @sgoldfed, Co-Founder & CEO of @Offchain (@arbitrum) • Arkady Karpman - CTO @ @RapydGlobal • @leviadam1 - Co-Founder @ Backed.Fi (Acquired by Kraken) • @tomteman - PM @ @ethereumfndn • Moderated by @SHAP0W - Managing Partner @ @MasterkeyVC 📅 Dec 24, 2025 | 5:00 PM IST 📍 HaHarash St 20, Floor 26, Tel Aviv + Livestreamed AGENDA: • 17:40 - Best Practices for Technical Founders (Arkady Karpman) • 18:30 - Panel: The Future of DeFi, RWA & Entrepreneurship Perfect for Web3 builders, Technical Entrepreneurs, Developers & anyone exploring Ethereum scaling or DeFi infrastructure. Brought to you by @Web3_Devs × @Offchain × @RapydGlobal x @BackedFi x @ethereumfndn Powered by @MasterkeyVC 🔗 All Links: linktr.ee/web3devsunderg… #Web3 #Fintech #Rapyd #Arbitrum #Ethereum #DeFi #payments #Entrepreneurship #BlockchainEvents #Web3DevsUnderground @SHAP0W @RoyOsherove @Amit_Masterkey @ELuttenberg789 @al23xyz @AlonKivity

Online Webinar #13: Bitcoin Multisig & Cross-Chain Tokens x.com/i/broadcasts/1…

Talked Bitcoin security with @adam3us → he says multisig is the optimal solution So I asked @_benkaufman to come teach it live to our @Web3_Devs . On December 3rd Be there or keep using single-key like it’s 2013 😅 luma.com/8hk8xrbf

🍸 Tomorrow: DeFi Drinks A relaxed evening session to wrap up the day: founders, VCs, LPs & DeFi frens welcome. Event partners: @1deltaDAO • @MasterkeyVC • @UprightVentures • @halo__xyz • @veryearlyxyz • @Lagoon_Finance • @CorkProtocol • @XDCNetwork • @bondoncredit luma.com/1ae18s6x

@JumperExchange Great grammar

May I meet you?

Don’t miss Amit

Don’t miss Tomer

@Web3_Devs Top speakers

November Meetup | Smart Contracts in Practice | vProgs Architecture | Web3 Devs underground with StarkWare & Kaspa. x.com/i/broadcasts/1…

LI.​FI Update: October 2025 🎃 We hit new highs with $8.2bn processed in volume this month (lifetime now $50bn+), integrated 10 new partners, and expanded our support across @HyperliquidX and stablecoin protocols. Read more: li.fi/knowledge-hub/…