ep.200 - Ledger CTO's Hacking Journey ⚠️ Securing 20% of Crypto with Charles Guillemet episode artwork

EPISODE · Jul 13, 2025 · 47 MIN

ep.200 - Ledger CTO's Hacking Journey ⚠️ Securing 20% of Crypto with Charles Guillemet

from The Kus · host The Kus

Join us for an exclusive interview with Ledger CTO Charles Guillemet, who shares his incredible journey from hacking his ISP at 13 to leading security for a company that protects over 20% of the crypto market cap. Discover how Ledger’s Donjon team breaks wallets to strengthen them, the truth behind supply chain security fears, and innovations like clear signing and transaction checks that saved $18M from scams in just one month. Charles dives into quantum computing myths, post-quantum cryptography, and Ledger’s plans for quantum-ready devices and mobile security integration. Learn why Ledger’s secure touchscreens and open-source frameworks are setting new standards for self-custody in crypto. Want to know what's happening on Polkadot first?Follow ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠The Kus⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ on X!⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠Music by Blissomatico⁠

Join us for an exclusive interview with Ledger CTO Charles Guillemet, who shares his incredible journey from hacking his ISP at 13 to leading security for a company that protects over 20% of the crypto market cap. Discover how Ledger’s Donjon team breaks wallets to strengthen them, the truth behind supply chain security fears, and innovations like clear signing and transaction checks that saved $18M from scams in just one month. Charles dives into quantum computing myths, post-quantum cryptography, and Ledger’s plans for quantum-ready devices and mobile security integration. Learn why Ledger’s secure touchscreens and open-source frameworks are setting new standards for self-custody in crypto. Want to know what's happening on Polkadot first?Follow ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠The Kus⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ on X!⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠Music by Blissomatico⁠

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ep.200 - Ledger CTO's Hacking Journey ⚠️ Securing 20% of Crypto with Charles Guillemet

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This episode was published on July 13, 2025.

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Join us for an exclusive interview with Ledger CTO Charles Guillemet, who shares his incredible journey from hacking his ISP at 13 to leading security for a company that protects over 20% of the crypto market cap. Discover how Ledger’s Donjon team...

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