Patents by Inventor Bobby Glen Barker

Bobby Glen Barker 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).

  • Differential fault analysis hardening apparatus and evaluation method
    Patent number: 6108419
    Abstract: A method of evaluating a cryptosystem to determine whether the cryptosystem can withstand a fault analysis attack, the method includes the steps of providing a cryptosystem having an encrypting process to encrypt a plaintext into a ciphertext, introducing a fault into the encrypting process to generate a ciphertext with faults, and comparing the ciphertext with the ciphertext with faults in an attempt to recover a key of the cryptosystem.
    Type: Grant
    Filed: January 27, 1998
    Date of Patent: August 22, 2000
    Assignee: Motorola, Inc.
    Inventors: Michael Philip LaMacchia, Bobby Glen Barker, Chuckwudi Perry