The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2012
Filed:
Jul. 21, 2006
Christopher Tofts, Stoke Gifford Bristol, GB;
Timothy Paul Spiller, Stoke Gifford Bristol, GB;
William John Munro, Stoke Gifford Bristol, GB;
Martin Sadler, Stoke Gifford Bristol, GB;
Keith Alexander Harrison, Stoke Gifford Bristol, GB;
Christopher Tofts, Stoke Gifford Bristol, GB;
Timothy Paul Spiller, Stoke Gifford Bristol, GB;
William John Munro, Stoke Gifford Bristol, GB;
Martin Sadler, Stoke Gifford Bristol, GB;
Keith Alexander Harrison, Stoke Gifford Bristol, GB;
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
Secret random data is distributed to a plurality of devices to provision them with new one-time pad data for use in interacting with apparatus holding the same one-time pad data. This distribution is effected by provisioning a first device with a block of secret random data that is, or will become, available to the apparatus. Part of the secret random data is then distributed from the first device to one or more other devices in a hierarchical distribution pattern headed by the first device. Each device, other than those at the bottom of the distribution hierarchy, retains part of the secret random data it receives and passes on the remainder. Each device uses that part of the secret random data it has retained to provide the device with new one-time pad data. A method is also provided for tracking service usage based on the distributed one-time pad data.