Software protection method utilizing hidden application code in a protection dynamic link library object
US7320075B2 · kind B2 · utility
16Cited by
23References
49Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2002 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | Dec 14, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/109
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method in which the operating system of the user computer loads the software application and a DLL having a portion of the application execution code stored therein into memory is disclosed. At selected points during its execution, the software application calls the DLL to execute a portion of the application code that was saved into the DLL before delivery to the end user. Since this code is encrypted and the encryption key is stored in a hardware security device and not in the DLL or the software application, the application code portion cannot be executed without recovering the key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.