Laurent Castelnovi

Title: The Innovative Mind of Laurent Castelnovi

Introduction

Laurent Castelnovi is a notable inventor based in Courbevoie, France. He has made significant contributions to the field of cryptography, particularly in developing countermeasures against fault injection attacks. His innovative approach has garnered attention in the tech community.

Latest Patents

Laurent holds a patent for a novel type of infective countermeasure against fault injection attacks. This invention proposes a unique method that applies the same diffusion function to two intermediate ciphers obtained from a cryptographic operation on an input. By amplifying errors within these infective ciphers, the approach allows for the use of diffusion functions that do not map the cipher 0 as an output equal to 0. Additionally, a cipher recomposed from bits of undiffused ciphers is generated, and these infective and recomposed ciphers are XOR-combined to produce an output cipher. This method enables the adaptation of protection against a desired number of injected faults through simple duplication of pairs and associated specific diffusion functions.

Career Highlights

Laurent is currently employed at Idemia France, where he continues to work on innovative solutions in the field of cybersecurity. His expertise in cryptography and fault tolerance has positioned him as a valuable asset to his team and the company.

Collaborations

Laurent collaborates with talented colleagues, including Guillaume Barbu and Luk Bettale. Their combined efforts contribute to advancing the company's research and development initiatives.

Conclusion

Laurent Castelnovi's work exemplifies the spirit of innovation in the field of cryptography. His patent on infective countermeasures showcases his ability to address complex challenges in cybersecurity. Through his contributions, he continues to influence the landscape of technological advancements.