Company Filing History:
3 out of 155 
1 out of 112 
1 out of 1 Years Active: 1994-2002
Title: The Innovations of David M'Raihi
Introduction
David M'Raihi is a notable inventor based in Paris, France. He has made significant contributions to the field of cryptography, holding a total of 5 patents. His work focuses on enhancing security protocols and methods for digital communication.
Latest Patents
One of M'Raihi's latest patents is a public key cryptography method. This invention is based on the discrete logarithm and computes a value G mod p. It proposes two solutions to reduce the number of multiplications. The first solution involves generating "hollow" k exponents with a few bits of value 1, while ensuring the total security of the system. The second solution performs calculations of the powers of g in parallel, combining the exponents to avoid repeating the same power computations for a given exponent. This invention is particularly useful for generating digital signatures, authentication, and encryption.
Another significant patent is a method for implementing a private-key communication protocol between two processing devices. At least one of these devices is a portable storage medium. The devices are equipped with a digital processing circuit that performs modular calculation operations. This circuit implements a private key encryption function consisting of reversible operations, including modular calculations and binary logic operations. This function can be applied for encrypting or signing messages, as well as decrypting received messages.
Career Highlights
Throughout his career, David M'Raihi has worked with several prominent companies, including Gemplus and Gemplus Card International. His experience in these organizations has contributed to his expertise in cryptography and secure communication technologies.
Collaborations
M'Raihi has collaborated with notable figures in the field, including David Naccache and Jacques Stern. These partnerships have further enriched his work and innovations in cryptographic methods.
Conclusion
David M'Raihi's contributions to cryptography and secure communication are significant. His innovative patents reflect his commitment to enhancing digital security. His work continues to influence the field and pave the way for future advancements.