Method and system for controlling use of protected software
US4685055A · kind A · utility
164Cited by
1References
1Claims
0Family size
Inventor
Key dates
| Filing date | Jul 1, 1985 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Jul 1, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2153
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A protection subroutine with a unique reference code is emplaced in a protected software package. The package also contains a validation program. The protection subroutine and validation program connect with an ESD and both the ESD and the program communicate with a secure computer. Upon receipt of inputs of the software serial number and reference code and the ESD identifier, the computer generates a validation code which causes the protection subroutine to command execution of the protected software by its hose computer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.