# Laurent Castillo I Signing with Confidence: YOLO to Clear Signing I Ledger I Pragma San Fran 2024

- Channel: [ETHGlobal](https://streameth.org/ethglobal)
- Date: 2025-10-09
- Duration: 19:58
- Topics: Laurent Castillo, Ledger, Clear Signing, Blind Signing, YOLO Signing, Blockchain Security, ERC-7730, Ethereum Transactions, Hardware Wallets, Phishing Attacks, Ledger Hardware Integration, Account Abstraction, User-Friendly UX, Smart Contract Security, Transaction Verification, Crypto Security, Ethereum Standards, Ledger Signer Kit, Pragma SF 2024
- Watch: https://streameth.org/watch/yt-0U-tnClKMjQ
- YouTube: https://www.youtube.com/watch?v=0U-tnClKMjQ

## Description

Join Laurent Castillo, VP of Architecture at Ledger, at Pragma San Francisco 2024 as he discusses how Ledger is revolutionizing blockchain security through clear signing. Laurent explores the risks and pitfalls of blind (YOLO) signing, showcases Ledger's innovative approach with the new ERC-7730 standard, and explains how clear signing dramatically improves user safety and confidence.

Discover the future of transaction signing, Ledger’s hardware wallet integrations, and how clear signing will combat phishing and scams on Ethereum and beyond.

00:00 Introduction: Laurent Castillo from Ledger
00:51 Risks of Blind (YOLO) Signing on Blockchain
01:36 What is Blind Signing & Why It's Dangerous
02:15 Shift in Attacks: Phishing & Scam Transactions
02:47 Financial Impact of Blind Signing Attacks
03:22 Clear Signing Explained & Ledger’s Vision
04:36 Evolution of Transaction Signing on Ethereum
05:16 Ledger's Early Solution: Plugins for Clear Signing
06:25 Data-Driven Approach to Improve UX for Signing
07:06 Introducing ERC-7730: A New Clear Signing Standard
07:43 ERC-7730 Goals: A Universal Clear Signing Standard
08:16 Why ABI Alone Isn't Enough for Clear Signing
08:49 Limitations of ABI in User-Friendly Transactions
09:25 How ERC-7730 Complements ABI for Better Clarity
10:10 ERC-7730 Standard Example & Field Customization
10:49 Philosophy of ERC-7730: Simple & Human-Readable
11:25 Optimized for Hardware Wallet Limitations
12:00 ERC-7730 Flexibility for Future Blockchain Trends
12:40 Ledger’s Clear Signing Initiative: End-to-End Tools
13:21 ERC-7730 Standard & Editing Tools Released
13:57 Public Registry & Ledger’s Curation Process
14:35 Ledger Integration & Hardware Wallet UI Support
15:22 Developer Guide: How to Implement ERC-7730
16:05 ERC-7730 at ETHGlobal Hackathon & Developer Tools
16:44 Ledger’s Clear Signing Roadmap & Future Plans
17:21 Accelerating Clear Signing Adoption in Q2 2024
18:18 Addressing Ethereum Account Abstraction Challenges
19:12 Conclusion & Resources for Ledger Clear Signing

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🇺🇸 *Pragma San Francisco*
Pragma San Francisco 2024 was a special gathering of founders and builders that took place October 16th and 17th at The Contemporary Jewish Museum in San Francisco, CA.  Pragma San Francisco 2024 was an opportunity discuss the future of web3 and reflect on the past. Watch the full Pragma San Francisco playlist here: https://youtube.com/playlist?list=PLXzKMXK2aHh4LcwDpGf_itZrAu7XRNb07&si=3x3y9J3avgNTITUe

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. 

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