Location History:
- Colombes, FR (2015 - 2020)
- Courbevoie, FR (2024)
Company Filing History:
Years Active: 2015-2024
Title: Innovations by Inventor Guillaume Barbu
Introduction
Guillaume Barbu is a notable inventor based in Colombes, France. He has made significant contributions to the field of cryptography, holding a total of 4 patents. His work focuses on developing innovative solutions to enhance security against various types of attacks.
Latest Patents
One of his latest patents is titled "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 significant patent is related to a "Cryptographic processing method, related electronic device and computer program," which outlines a comprehensive cryptographic processing method.
Career Highlights
Throughout his career, Guillaume Barbu has worked with prominent companies in the technology sector, including Idemia France and Oberthur Technologies. His experience in these organizations has allowed him to refine his skills and contribute to cutting-edge innovations in cryptography.
Collaborations
Guillaume has collaborated with notable professionals in his field, including Christophe Giraud and Luk Bettale. These collaborations have further enriched his work and expanded the impact of his inventions.
Conclusion
Guillaume Barbu is a distinguished inventor whose innovative contributions to cryptography have led to the development of advanced security measures. His patents reflect a deep understanding of the challenges in the field and a commitment to finding effective solutions.