Patents by Inventor Burt Kaliski

Burt Kaliski 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).

  • System and method providing disconnected authentication
    Patent number: 8966276
    Abstract: In a system for disconnected authentication, verification records corresponding to given authentication token outputs over a predetermined period of time, sequence of events, and/or set of challenges are downloaded to a verifier. The records include encrypted or hashed information for the given authentication token outputs. In one embodiment using time intervals, for each time interval, token output data, a salt value, and a pepper value, are hashed and compared with the verification record for the time interval. After a successful comparison, a user can access the computer. A PIN value can also be provided as an input the hash function. A portion of the hash function output can be used as a key to decrypt an encrypted (Windows) password, or other sensitive information.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: February 24, 2015
    Assignee: EMC Corporation
    Inventors: Andrew Nanopoulos, Karl Ackerman, Piers Bowness, William Duane, Markus Jakobsson, Burt Kaliski, Dmitri Pal, Shane D. Rice, Ronald L. Rivest
  • System and method providing disconnected authentication
    Publication number: 20050166263
    Abstract: In a system for disconnected authentication, verification records corresponding to given authentication token outputs over a predetermined period of time, sequence of events, and/or set of challenges are downloaded to a verifier. The records include encrypted or hashed information for the given authentication token outputs. In one embodiment using time intervals, for each time interval, token output data, a salt value, and a pepper value, are hashed and compared with the verification record for the time interval. After a successful comparison, a user can access the computer. A PIN value can also be provided as an input the hash function. A portion of the hash function output can be used as a key to decrypt an encrypted (Windows) password, or other sensitive information.
    Type: Application
    Filed: September 10, 2004
    Publication date: July 28, 2005
    Inventors: Andrew Nanopoulos, Karl Ackerman, Piers Bowness, William Duane, Markus Jakobsson, Burt Kaliski, Dmitri Pal, Shane Rice, Ronald Rivest