| 摘要 |
Periodically sending by a telecommunication controlled application an encrypted message to a licensed server to request permission to run and to obtain a list of permitted features. The license server application is executing on the same processor as the controlled application. Also resident on the same system is a license file which contains a list of applications that are permitted to run, the version number of the permitted applications and a list of permitted features. The license server is responsive to the encrypted message from the controlled application to read and decrypt the license file, read the serial number of the processor controlling the telecommunications system, compare the serial number obtained from the processor with the serial number stored in the license file. If there is a mis-match, no license is granted to the control applications and it will not be allowed to run. If the serial numbers match, then a comparison is made between the version number received from the application and the corresponding version number associated with the application in the license file. If the version number mis-matches, an encrypted message is sent to the application denying it permission to run. If the version number matches, an encrypted message is sent to the application granting it permission to run and listing the permitted features. To decrypt the license file, the license server utilizes a key that is assigned to the license server either globally or on a per system basis.
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