Deep Dive into Privacy Enhancing Technologies I Remi Gai

Sun, Nov 2, 2025, 12:00 AM

Remi Gai’s talk, “Deep Dive into Privacy Enhancing Technologies,” explores the critical need for privacy in blockchain and crypto, highlighting that transparency, while useful for verification and compliance, deters adoption due to privacy concerns. Remi explains privacy as a spectrum: from pseudonymity (default, but weak privacy), to confidentiality (hiding amounts), anonymity (hiding participants), and total privacy (hiding all data). He reviews privacy-enhancing technologies: Zero-Knowledge Proofs (ZK), Fully Homomorphic Encryption (FHE), Trusted Execution Environments (TEE), and Multi-Party Computation (MPC), comparing their trade-offs in compliance, composability, and performance. Remi emphasizes the importance of flexible decryption and composability for compliance and business logic, introducing confidential tokens and the Confidential Token Association. He presents Inco, a private compute layer using encryption-based approaches for EVM-compatible blockchains, enabling confidential tokens, private voting, and gaming with minimal developer friction. Remi encourages collaboration to advance privacy as a foundational blockchain primitive. 00:00 Introduction 00:31 The Privacy Problem in Blockchain 01:36 Privacy as a Spectrum 02:26 Pseudonymity and Its Limits 03:13 Confidentiality Use Cases 03:57 Anonymity and Total Privacy 05:12 Choosing the Right Privacy Model 05:31 Compliance and Privacy 05:59 Overview of Privacy Technologies (ZK, FHE, TEE, MPC) 06:23 Fully Homomorphic Encryption (FHE) Explained 09:21 FHE Challenges and Scalability 09:46 Trusted Execution Environments (TEE) 11:31 Commitment vs. Encryption-Based Solutions 12:48 Flexible Decryption and Compliance 13:35 Composability in Privacy Systems 14:50 Confidential Token Ecosystem and Identity 15:47 Confidential Token Association 16:13 Introducing Inco: Private Compute Layer 17:26 Developer Experience and Use Cases 18:17 Private Voting and Randomness 18:56 General Purpose Privacy Applications 19:13 Partnerships and Call to Action 19:37 Conclusion _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 🇮🇳 *Pragma New Delhi* Pragma New Delhi 2025 was held on September 25th at the JW Marriott Hotel in Aerocity New Delhi and was an in-person summit for builders and leaders in the web3 ecosystem. Watch the full Pragma New Delhi YouTube Playlist here: ETHGlobal's Pragma series takes place in cities around the world, and is designed to be a different kind of event. Pragma is a one-stage conference with founders-only on stage, bringing together a small group of curated attendees and speakers to discuss the future of web3 and reflect on the past. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ✅ Follow Remi Gai X: https://x.com/remi_gai ✅ Follow Inco Network X: https://x.com/inconetwork ✅ Follow ETHGlobal X: https://x.com/ETHGlobal​ Warpcast: https://warpcast.com/ethglobal Website: https://ethglobal.com YouTube: https://www.youtube.com/@UCfF9ZO8Ug4xk_AJd4aeT5HA _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Are you interested in Ethereum development and entrepreneurship? 👉 Sign up for the next ETHGlobal event: https://ethglobal.com/events 🎁 Get exclusive access and perks with ETHGlobal Plus! https://ethglobal.com/plus 📣 Want us to throw an event in your city? Tell us where! https://ethglobal.com/city _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _