Ledger CTO | Charles Guillemet

In this interview, Patrick speaks with Charles Guillemet, the CTO of Ledger, about the security aspects of hardware wallets. Charles discusses his background in cryptography and security, and explains the importance of secure elements and certifications like EAL ratings. He emphasizes that having a secure element is not enough; how it's implemented is crucial, detailing how Ledger uses secure elements differently from competitors. The conversation covers the challenges of open-source hardware, the guarantees provided by secure elements, and the importance of code integrity. They also discuss wallet scrutiny tests, transaction clarity, and Ledger's efforts to decode call data for complex transactions, as well as the new Ledger Recover Key for secure backups.