Charles Guillemet is Chief Technology Officer at Ledger, the world's most secure platform for Web3 and digital assets. Ledger secures almost 20% of the world's crypto and has sold over 5 million devices, shipping to 180 countries.

Guillemet joined Ledger in 2017 and created the Ledger Security department known as the Donjon, where Ledger's world-class white hat hackers work to keep Ledger's secure element technology intact and alert others to vulnerabilities.

Charles's worked for 15 years in the Cryptography & Hardware Security sector, designing, and breaking critical security solutions. In his pastime, you can find Charles skiing in France.