Patents by Inventor David Claude Toll

David Claude Toll 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, apparatus and system for resistance to side channel attacks on random number generators
    Patent number: 8135766
    Abstract: A random number generator (RNG) resistant to side channel attacks includes an activation pseudo random number generator (APRNG) having an activation output connected to an activation seed input to provide a next seed to the activation seed input. A second random number generator includes a second seed input, which receives the next seed and a random data output, which outputs random data in accordance with the next seed. An input seed memory is connected to the activation seed input and a feedback connection from the activation output so that the next seed is stored in the input seed memory to be used by the APRNG as the activation seed input at a next startup cycle.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: March 13, 2012
    Assignee: International Business Machines Corporation
    Inventors: Suresh Narayana Chari, Vincenzo Valentino Diluoffo, Paul Ashley Karger, Elaine Rivette Palmer, Tal Rabin, Josyula Ramachandra Rao, Pankaj Rohatgi, Helmut Scherzer, Michael Steiner, David Claude Toll
  • Method, apparatus and system for resistance to side channel attacks on random number generators
    Patent number: 7496616
    Abstract: A random number generator (RNG) resistant to side channel attacks includes an activation pseudo random number generator (APRNG) having an activation output connected to an activation seed input to provide a next seed to the activation seed input. A second random number generator includes a second seed input, which receives the next seed and a random data output, which outputs random data in accordance with the next seed. An input seed memory is connected to the activation seed input and a feedback connection from the activation output so that the next seed is stored in the input seed memory to be used by the APRNG as the activation seed input at a next startup cycle.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: February 24, 2009
    Assignee: International Business Machines Corporation
    Inventors: Suresh Narayana Chari, Vincenzo Valentino Diluoffo, Paul Ashley Karger, Elaine Rivette Palmer, Tal Rabin, Josyula Ramachandra Rao, Pankaj Rohatgi, Helmut Scherzer, Michael Steiner, David Claude Toll
  • METHOD, APPARATUS AND SYSTEM FOR RESISTANCE TO SIDE CHANNEL ATTACKS ON RANDOM NUMBER GENERATORS
    Publication number: 20090049111
    Abstract: A random number generator (RNG) resistant to side channel attacks includes an activation pseudo random number generator (APRNG) having an activation output connected to an activation seed input to provide a next seed to the activation seed input. A second random number generator includes a second seed input, which receives the next seed and a random data output, which outputs random data in accordance with the next seed. An input seed memory is connected to the activation seed input and a feedback connection from the activation output so that the next seed is stored in the input seed memory to be used by the APRNG as the activation seed input at a next startup cycle.
    Type: Application
    Filed: June 2, 2008
    Publication date: February 19, 2009
    Inventors: Suresh Narayana Chari, Vincenzo Valentino Diluoffo, Paul Ashley Karger, Elaine Rivette Palmer, Tal Rabin, Josyula Ramachandra Rao, Pankaj Rohatgi, Helmut Scherzer, Michael Steiner, David Claude Toll
  • Security policy for protection of files on a storage device
    Patent number: 6430561
    Abstract: Access to files by accessing programs, where files comprise other files, programs and data is controlled. An initial access class is assigned to each file and to each accessing program. An access class comprises an integrity access class and a secrecy access class. An integrity access class comprises rules governing modification of data contained in files and a security access class comprises rules governing disclosure of data contained in files. An integrity access class comprises a set of rules for allowing the performance of a read function, and another set of rules for allowing the performance of write/execute function. An execute function comprises transferring and chaining, where chaining comprises starting another process running at potentially different secrecy and integrity access classes. A secrecy access class comprises a set of rules for allowing the performance of a write function, and another set of rules for allowing the performance of read/execute function.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: August 6, 2002
    Assignee: International Business Machines Corporation
    Inventors: Vernon Ralph Austel, Paul Ashley Karger, David Claude Toll