Patents by Inventor Andrew D. Akehurst-Ryan

Andrew D. Akehurst-Ryan 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).

  • Embedded extrinsic source for digital certificate validation
    Patent number: 9736146
    Abstract: A computer uses the information included within a digital certificate to obtain a current date and time value from a trusted extrinsic trusted source and the computer compares the obtained current date and time value to a validity period included in the digital certificate to determine if the digital certificate is expired. The information included within the digital certificate specifying an extrinsic source for the current date and time value can be included in an extension of the digital certificate, and the information can specify a plurality of extrinsic sources.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: August 15, 2017
    Assignee: International Business Machines Corporation
    Inventors: Andrew D. Akehurst-Ryan, David J. McKechan, Stuart J. Reece
  • EMBEDDED EXTRINSIC SOURCE FOR DIGITAL CERTIFICATE VALIDATION
    Publication number: 20160127355
    Abstract: A computer uses the information included within a digital certificate to obtain a current date and time value from a trusted extrinsic trusted source and the computer compares the obtained current date and time value to a validity period included in the digital certificate to determine if the digital certificate is expired. The information included within the digital certificate specifying an extrinsic source for the current date and time value can be included in an extension of the digital certificate, and the information can specify a plurality of extrinsic sources.
    Type: Application
    Filed: January 8, 2016
    Publication date: May 5, 2016
    Inventors: Andrew D. Akehurst-Ryan, David J. McKechan, Stuart J. Reece
  • Embedded extrinsic source for digital certificate validation
    Patent number: 9264236
    Abstract: A computer uses the information included within a digital certificate to obtain a current date and time value from a trusted source extrinsic to the computer. The computer requests and receives the trusted current date and time value and compares the trusted current date and time value to a validity period included in the digital certificate, to determine if the digital certificate is expired. The information included within the digital certificate specifying an extrinsic source for the current date and time value can be included in an extension of the digital certificate, and the information can specify a plurality of extrinsic sources.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: February 16, 2016
    Assignee: International Business Machines Corporation
    Inventors: Andrew D. Akehurst-Ryan, David J. McKechan, Stuart J. Reece
  • EMBEDDED EXTRINSIC SOURCE FOR DIGITAL CERTIFICATE VALIDATION
    Publication number: 20150121069
    Abstract: A computer uses the information included within a digital certificate to obtain a current date and time value from a trusted source extrinsic to the computer. The computer requests and receives the trusted current date and time value and compares the trusted current date and time value to a validity period included in the digital certificate, to determine if the digital certificate is expired. The information included within the digital certificate specifying an extrinsic source for the current date and time value can be included in an extension of the digital certificate, and the information can specify a plurality of extrinsic sources.
    Type: Application
    Filed: January 5, 2015
    Publication date: April 30, 2015
    Inventors: Andrew D. Akehurst-Ryan, David J. McKechan, Stuart J. Reece