Patents by Inventor Josyula Ramachandra Rao

Josyula Ramachandra Rao 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
  • System and method for debugging distributed programs
    Patent number: 5933639
    Abstract: This invention provides a small and efficient set of primitives for debugging a distributed application that runs on a plurality of processors connected by a common network. These primitives permit a user to debug a distributed application in a manner similar to debugging a non-distributed application. The invention allows a user to step into and return from a remote procedure call in exactly the same manner as a local procedure call. The invention also allow a user to set breakpoints in a server for specific clients and to specify conditions under which a particular remote call from a client should trap in a server. These capabilities greatly simplify the process of debugging distributed applications such as client-server programs.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: August 3, 1999
    Assignee: International Business Machines Corporation
    Inventors: Michael Stephen Meier, Kevan Lee Miller, Donald Philip Pazel, Josyula Ramachandra Rao, James Robert Russell