Patents by Inventor Steven Wierenga

Steven Wierenga 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).

  • Publication number: 20070011736
    Abstract: Systems, methods, and apparatus are provided for policy protected cryptographic Application Programming Interfaces (APIs) that are deployed in secure memory. One embodiment is a method of software execution. The method includes executing an application in a first secure memory partition; formatting a request to comply with a pre-defined secure communication protocol; transmitting the request from the application to a cryptographic application programming interface (API) of the application, the API being in a second secure memory partition that is separate and secure from the first secure memory partition; and verifying, in the second secure memory partition, that the request complies with a security policy before executing the request.
    Type: Application
    Filed: July 8, 2005
    Publication date: January 11, 2007
    Inventors: Jeff Kalibjian, Ralph Bestock, Larry Hines, W. Hopkins, Vladimir Libershteyn, Steven Wierenga, Susan Langford
  • Publication number: 20050190912
    Abstract: A method and apparatus provides cryptographic parameters for use in cryptographic applications in response to requests therefor. The method includes the steps of: pre-computing one or more different types of sets of cryptographic parameters, each the type of set being adapted for use by an associated type of cryptographic application; securely storing the pre-computed sets of cryptographic parameters in a memory storage unit; receiving a request for a set of cryptographic parameters having specified characteristics for use in a particular cryptographic application; determining one of the sets of cryptographic parameters stored in the memory storage unit that has specified characteristics; accessing the determined set of cryptographic parameters from the memory storage unit; and providing the determined set of cryptographic parameters with minimal latency.
    Type: Application
    Filed: March 26, 2001
    Publication date: September 1, 2005
    Inventors: W. Hopkins, Thomas Collins, Steven Wierenga, Larry Hines
  • Publication number: 20050149739
    Abstract: A PIN verification apparatus comprises a plurality of cipher blocks linked in a Cipher Block Chain (CBC) and keyed with a secret PIN Verification Key (PVK). A first input block is coupled to a first cipher block in the CBC chain and is configured to receive a plaintext block derived from a secret PIN. A second input block is coupled to a second cipher block in the CBC chain capable of receiving a plaintext block derived from a non-secret entity-identifier and ciphertext from a cipher block in the CBC chain.
    Type: Application
    Filed: December 31, 2003
    Publication date: July 7, 2005
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: W. Hopkins, Steven Wierenga, Ching-Hsuan Chen, Jack Schifando