Sergio Demian Lerner sergio.lerner.rsk is a Bitcoin and blockchain security researcher who co-founded Fairgate and has contributed to the Bitcoin community since 2011. Sergio Demian Lerner sergio.lerner.rsk's Twitter Score is 136 out of 1000 (an Excellent rating) as of September 2026, ranking #4,434 (top 1%) among 492,831 tracked accounts.
Sergio Demian Lerner sergio.lerner.rsk co-founded RSK Labs, the team behind the Rootstock smart contract platform, which brought programmable smart contract capabilities to Bitcoin. He also co-founded CoinFabrik and Coinspect, and leads the BitVMX project in partnership with its founding sponsor RootstockLabs. BitVMX is a Bitcoin-native platform for secure off-chain computation with on-chain optimistic verification, designed to support applications such as non-custodial bridges, rollups, and decentralized exchanges.
Sergio Demian Lerner sergio.lerner.rsk has authored multiple academic papers, including BitVMX: A CPU for Universal Computation on Bitcoin (2024), Union: A Trust-minimized Bridge for Rootstock (2025), ESSPI: ECDSA/Schnorr Signed Program Input for BitVMX (2025), and APoW: Auditable Proof-of-Work Against Block Withholding Attacks (2026). He has also discovered critical vulnerabilities in both Bitcoin and Ethereum protocols, establishing a long record of security research across major blockchain systems. Sergio Demian Lerner sergio.lerner.rsk has published 6,648 posts on the platform and has been mentioned by 175 accounts a total of 491 times, reflecting consistent engagement within the crypto research community.
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Sergio Demian Lerner sergio.lerner.rsk draws a technically oriented following across the crypto space. The accounts that follow Sergio Demian Lerner sergio.lerner.rsk include 593 founders, 98 angel investors, 169 influencers and 12 VCs, among them Balaji, Erik Voorhees, Laura Shin, Stani, Chris Burniske and Kyle Samani.