Background
Renaud Dubois is a cryptologist with 20 years of experience spanning defense, aerospace, and blockchain industries. His career includes significant roles at Thales Defense and Ledger, where he developed production-grade cryptographic solutions used by millions.
Publications & Patents
Renaud has authored numerous academic publications in cryptography and holds multiple patents in secure systems and cryptographic protocols. His research contributions span elliptic curve cryptography, signature schemes, and post-quantum algorithms.
Key Realizations
Renaud delivered the fastest generic elliptic curve cryptography (ECC) implementations, achieving record-breaking performance for signature verification on embedded and blockchain platforms. His secp256r1 (P-256) optimizations have been integrated into production systems including the Coinbase Smart Wallet, enabling passkey-based authentication for millions of users.
Notable achievements include:
- 50% gas cost reduction for secp256r1 verification on Starknet
- Up to 15x performance improvements for EVM signature verification
- EIP-8051 and EIP-8052 proposals for post-quantum Ethereum transition
- FIPS 204-compliant ML-DSA implementations for hardware wallets
At ZKNOX
As co-founder, Renaud leads ZKNOX's cryptographic research and implementation efforts. His focus areas include post-quantum cryptography, zero-knowledge proofs, and optimized signature schemes for blockchain environments.