Systems and methods that authorize target devices utilizing proprietary software and/or hardware
US7024554B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 2000 |
| Grant date | Apr 4, 2006 |
| Priority date | — |
| Expiry date | Aug 12, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An integrated system comprises an authorization device that generates a second encrypted data stream in response to a first data stream, and a programmable logic device (PLD) that generates a third encrypted data stream in response to the first data stream, while simultaneously operating under at least partial control of program code during a first time interval This third encrypted data stream is preferably generated internal to the programmable logic device. Authorization detection circuitry is also preferably provided that compares the second and third encrypted data streams at least periodically during the first time interval. This circuitry may also disable operation of the programmable logic device if the second and third encrypted data streams indicate that the programmable gate array is not authorized to use the program code. The authorization detection circuitry is preferably provided within the programmable logic device and may utilize at least a portion of the proprietary program code (e.g., “deadman” code) to perform its operations. Disabling operation of the programmable logic device may constitute a complete shut down of the programmable logic device or the performanc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.