# Charles Guillemet I Ledger Key Ring Protocol with Ledger I Pragma Bangkok 2024

- Speakers: Charles Guillemet
- Channel: [ETHGlobal](https://streameth.org/ethglobal)
- Date: 2025-10-09
- Duration: 15:48
- Topics: Ledger, Charles Guillemet, Key Ring Protocol, Encryption, Privacy, Self-Custody, Decentralized, Ledger Live, Blockchain, Cryptography, Confidentiality, Security, Permissionless, Censorship Resistance, Synchronization, End-to-End, Sovereign Data, User Sovereignty, Key Management, Revocation, Master Keys, Secure Messaging, Digital Assets, Web3, Zero-Knowledge
- Watch: https://streameth.org/watch/yt-SA_tzG9XR2E
- YouTube: https://www.youtube.com/watch?v=SA_tzG9XR2E

## Description

Discover how Ledger is expanding the possibilities of self-custody, privacy, and encryption with its new Key Ring Protocol. In this talk, Charles Guillemet, CTO of Ledger, explains how the protocol empowers users to encrypt and share data securely—without sacrificing usability or sovereignty. 

Learn how confidentiality can finally be added to the benefits of decentralized consensus, how Ledger Live synchronizes user data while keeping it private, and why true self-custody must include control over your digital information. Explore real-world scenarios like end-to-end encrypted messaging and private photo sharing, and find out how developers can build privacy-focused apps on top of this open protocol.

Topics Covered
• Self-custody and the importance of permissionless blockchain technology
• Why privacy and confidentiality are the missing pieces of most blockchains
• How Ledger’s Key Ring Protocol introduces encryption key management
• Synchronizing Ledger Live data across devices without compromising user ownership
• Future potential for secure messaging, private file storage, and more
• Developer call to action for building new sovereign applications

00:00 Introduction & Context
00:54 Why Blockchain Self-Custody Matters
02:12 Decentralized Consensus & Censorship Resistance
04:07 Missing Confidentiality in Most Blockchains
06:09 Importance of Privacy & Sovereign Data
08:02 Key Ring Protocol Overview
10:45 Ledger Live Sync & Encrypted Data
12:30 Real-World Use Cases: Messaging & Photos
14:52 Developer Call to Action
15:29 Conclusion & Closing Words

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🎤 *Pragma Bankgkok*
Pragma Bangkok 2024 closed out a year of exceptional Pragma events held around the world, and offered the global Web3 community a chance to hear from founders and builders as they reflect on the past, and look to the future of Web3.  Pragma Bangkok 2024 was held on November 14th at the Hyatt Regency Bangkok Sukhumvit in Bangkok, Thailand. Watch the full YouTube Playlist here: https://youtube.com/playlist?list=PLXzKMXK2aHh4JNkhnsv5F95OqxT_IjCEl&si=6Tv3CvB6vrQIIjBA

ETHGlobal's Pragma series, which began in Tokyo in the spring of 2023, has been fostering a curated, global community of individuals who deeply care about web3. You can learn more about Pragma and upcoming events in the series here: https://ethglobal.com/pragma

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