Run-time code injection to perform checks
US7694341B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2005 |
| Grant date | Apr 6, 2010 |
| Priority date | — |
| Expiry date | Feb 4, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2103
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digital rights management system permits an application owner to cause code to be injected into the application's run-time instruction stream so as to restrict execution of that application to specific hardware platforms. In a first phase, an authorizing entity (e.g., an application owner or platform manufacturer) authorizes one or more applications to execute on a given hardware platform. Later, during application run-time, code is injected that performs periodic checks are made to determine if the application continues to run on the previously authorized hardware platform. If a periodic check fails, at least part of the application's execution string is terminated—effectively rendering the application non-usable. The periodic check is transparent to the user and difficult to circumvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.