Patents by Inventor Phong Q. Nguyen

Phong Q. Nguyen 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).

  • Methods and apparatus for private certificates in public key cryptography
    Patent number: 7404078
    Abstract: Private certificates designed to counteract problems associated with certificate lending are configured such that disclosure of a secret key associated with one certificate automatically results in disclosure of a secret key associated with another certificate, while the corresponding public keys are unlinkable with one another. In an illustrative private certificate generation protocol, a user generates verification information associated with a first public key. The verification information is generated at least in part using a corresponding first secret key. The verification information is supplied to a certification authority, which generates based at least in part on the first public key and the verification information a second public key having a corresponding second secret key, and generates a certificate based at least in part on the second public key. The private certificate generation protocol may be asymmetric or symmetric.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: July 22, 2008
    Assignee: Lucent Technologies
    Inventors: Bjorn Markus Jakobsson, Phong Q. Nguyen
  • Methods and apparatus for private certificates in public key cryptography
    Publication number: 20040003236
    Abstract: Private certificates designed to counteract problems associated with certificate lending are configured such that disclosure of a secret key associated with one certificate automatically results in disclosure of a secret key associated with another certificate, while the corresponding public keys are unlinkable with one another. In an illustrative private certificate generation protocol, a user generates verification information associated with a first public key. The verification information is generated at least in part using a corresponding first secret key. The verification information is supplied to a certification authority, which generates based at least in part on the first public key and the verification information a second public key having a corresponding second secret key, and generates a certificate based at least in part on the second public key. The private certificate generation protocol may be asymmetric or symmetric.
    Type: Application
    Filed: June 26, 2002
    Publication date: January 1, 2004
    Inventors: Bjorn Markus Jakobsson, Phong Q. Nguyen