Patents by Inventor Jose Manuel Cerecedo Lopez

Jose Manuel Cerecedo Lopez has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for sharing secret information and performing certification in a communication system that has a plurality of information processing apparatuses
    Patent number: 5708714
    Abstract: The object of the present invention is to perform verifiable secret sharing by a practical amount of calculation and a practical amount of communication. In addition, by using this process, a shared digital signature is generated, or a shared authentication server is provided.In a communication system where a plurality of information processing apparatuses are connected across secret communication channels and a broadcast communication channel, an information processing apparatus d generates a secret matrix from secret information s, l1, . . . , lk, extracts the first information segments for individual apparatuses i, and secretly transmits it to each apparatus i. The information processing apparatus d performs hash function on the secret matrix and broadcasts the output value.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: January 13, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jose Manuel Cerecedo Lopez, Keiichi Iwamura