Program distribution method and system
US7552092B2 · kind B2 · utility
2Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2004 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Apr 13, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/64
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In the present invention, a program is provided with a dummy module into which a watermark can be inserted without any effect on the operation of the program, and an digital signature. It is thereby possible for a distributor to insert a watermark for specifying a user to the dummy module, and to prevent unauthorized leakage of the program by the distributor. Further, by providing the program body with an digital signature, it is possible to prevent tampering of the program by the distributor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.