Patents by Inventor Dinah Lea Marie Davis

Dinah Lea Marie Davis 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).

  • Systems and Methods to Securely Generate Shared Keys
    Publication number: 20100104102
    Abstract: A method for secure bidirectional communication between two systems is described. A first key pair and a second key pair are generated, the latter including a second public key that is generated based upon a shared secret. First and second public keys are sent to a second system, and third and fourth public keys are received from the second system. The fourth public key is generated based upon the shared secret. A master key for encrypting messages is calculated based upon a first private key, a second private key, the third public key and the fourth public key. For re-keying, a new second key pair having a new second public key and a new second private key is generated, and a new fourth public key is received. A new master key is calculated using elliptic curve calculations using the new second private key and the new fourth public key.
    Type: Application
    Filed: January 4, 2010
    Publication date: April 29, 2010
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Michael K. Brown, Herbert A. Little, David Victor MacFarlane, Michael S. Brown, Dinah Lea Marie Davis
  • Systems and methods to securely generate shared keys
    Patent number: 7646872
    Abstract: A method for secure bidirectional communication between two systems is described. A first key pair and a second key pair are generated, the latter including a second public key that is generated based upon a shared secret. First and second public keys are sent to a second system, and third and fourth public keys are received from the second system. The fourth public key is generated based upon the shared secret. A master key for encrypting messages is calculated based upon a first private key, a second private key, the third public key and the fourth public key. For re-keying, a new second key pair having a new second public key and a new second private key is generated, and a new fourth public key is received. A new master key is calculated using elliptic curve calculations using the new second private key and the new fourth public key.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: January 12, 2010
    Assignee: Research In Motion Limited
    Inventors: Michael K. Brown, Herbert A. Little, David Victor MacFarlane, Michael S. Brown, Dinah Lea Marie Davis