Nicolas Debande

Title: Innovations of Nicolas Debande

Introduction

Nicolas Debande is a notable inventor based in Courbevoie, France. He has made significant contributions to the field of cryptography, holding three patents that showcase his innovative approach to security measures against fault injection attacks.

Latest Patents

One of his latest patents focuses on infective countermeasures. This invention proposes a novel type of infective countermeasure against fault injection attacks. Instead of determining the injected error before amplifying it, the novel countermeasure applies the same diffusion function to two intermediate ciphers obtained by executing a cryptographic operation on an input. The error is therefore amplified within the same intermediate ciphers, referred to as infective ciphers after diffusion. It is then possible to use diffusion functions that do not map the cipher 0 as an output equal to 0. A cipher recomposed from bits of undiffused ciphers is also generated. These infective and recomposed ciphers are XOR-combined to provide an output cipher. This approach makes it possible to adapt, by simple duplication of the pairs and associated specific diffusion functions, the protection offered by the countermeasure to a desired number of injected faults. Another patent involves a cryptographic processing method, related electronic device, and computer program, which comprises several steps aimed at enhancing cryptographic security.

Career Highlights

Nicolas Debande is currently employed at Idemia France, a company known for