Nathan Reboud

Title: Nathan Reboud: Innovator in Cryptographic Technologies

Introduction

Nathan Reboud is a prominent inventor based in Paris, France. He has made significant contributions to the field of cryptography, holding three patents that showcase his innovative approach to security technologies. His work focuses on enhancing device authentication and developing countermeasures against fault injection attacks.

Latest Patents

One of Nathan Reboud's latest patents is titled "Authentication of a device by a cryptographic process." This invention outlines a processing method implemented by a first device, which includes receiving first data with a challenge datum and obtaining key data that includes an encrypted cryptographic key. The process involves executing a cryptographic masking function and determining a decrypted cryptographic key through a decryption algorithm. The final step sends an answer datum to authenticate the first device.

Another notable patent is "Infective countermeasures," which proposes a novel type of countermeasure against fault injection attacks. This invention applies a diffusion function to two intermediate ciphers obtained from a cryptographic operation on an input. By amplifying the error within the same intermediate ciphers, referred to as infective ciphers, the approach allows for the use of diffusion functions that do not map the cipher 0 as an output equal to 0. This innovative method enhances the protection offered by the countermeasure against injected faults.

Career Highlights

Nathan Reboud is currently employed at Idemia France, a company known