Charles Guillemet
Paris, France
CTO at Ledger | CTO at Ledger
Summary
Charles joined Ledger in 2017 as Chief Security Officer after working for 10 years of in the Cryptography & Security sector. He is now Chief Technology Officer since 2019. He started his career at Tiempo, an innovative startup in the Secure industry, where he was designing the security of EAL5+ secure integrated circuits. He then worked as Technical Manager in an Information Technology Security Evaluation Facility (ITSEF) at the CEA (French research organisation in the areas of energy, defense and security, information technologies and health technologies). Charles holds a Master of Science in Cryptography & Security at the Engineering School ENSIMAG, with a Major Cryptography and Security (Valedictorian), where he also used to be a Lecturer. As a speaker, he gave his insights in various security conferences as well as Blockchain events. His field of expertise comprises Cryptography, Blockchain, Software Engineering. He's especially interested in Decentralized protocols for Crypto: Bitcoin, Ethereum, DeFi, DAO, NFT and more recently L2. Familiar with advanced cryptography: Zero-Knowledge proof, SNARKs, MPC, TSS and more.
Ledger
1mo
CTO
1 Jul 2019 - Present
1mo
In charge of Technology at Ledger: Software engineering, Security research, Product Security, Infras, Architecture and Innovation. - Management - built a top notch tech teams: Recruit, Manage, grow (from 50 to 350+) Engineers and researchers - Global Product, Tech strategy incl. budget, Architecture, Security - Working processes, delivery and QA Speaker at several Security, Cryptocurrency, Blockchain, and web3 conferences. - Outreach: Press interview, Briefing, digital content (Blog posts, social media) blog.ledger.com - ExCom member
CSO
1 Dec 2017 - 31 Jul 2019
1mo
In charge of Security at Ledger. Created, lead and manage Ledger's Internal security team (from 0 to 15 people): Donjon - Security assessment of Ledger's products - Third party security audit / consulting - Security research and publication donjon.ledger.com Responsible for certification program - Ledgers' products: hardware wallets and Vault - company information security in charge of security and processes
CEA - Commissariat à l'énergie atomique et aux énergies alternatives
1mo
Technical Manager
1 Apr 2015 - 31 Dec 2017
1mo
Région de Grenoble, France
In charge of - Technical aspects of the ITSEF (Security lab) - R&D - Internal Developments - Technical review of the evaluations Technical supervision of the ITSEF team: 20+ people Leti ITSEF representative in * ISCI WG1 (International Smartcard Certification Initiative - Working Group 1) * JHAS (JIL Hardware-related Attacks Subgroup) * EMVCo lab meetings
CESTI - Cryptography & Security Evaluator
1 Feb 2014 - 30 Apr 2015
1mo
Région de Grenoble, France
Cryptography/Security Evaluation at CESTI-LETI (ITSEF) Grenoble - Project leader Involved in : - Side Channel Attacks - Formal Methods evaluation - Common Criteria schemes.
Teaching - SmartCard Security - Master II
Grenoble INP - Ensimag
1 Oct 2015 - 31 Oct 2017
2yrs
Région de Grenoble, France
Teaching - Hardware Security focusing on Smartcards technology - Master II UJF / ENSIMAG - Smartcard Design and protocols. 7816 / 14443 IF / EMVCo - Faults attacks and DFA cryptanalysis - Side Channel Attacks
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