Microsoft Corporation
Timestamped license data structure

Abstract:

Technology is disclosed herein for a timestamped license data structure. In at least one implementation, program instructions stored on one or more computer readable storage media, when executed by a processing system, direct the processing system to at least, responsive to a launch of an application, obtain a license file for the application, the license file comprising a license data structure comprising: a user license; a licensing service signature; a licensing service public key; and a trusted timestamp package. The processing system is also directed to analyze the license data structure using the trusted timestamp package to determine if the licensing service public key was valid when the user license was signed by the licensing service signature if the licensing service public key is invalid. If the licensing service public key was valid when the user license was signed by the licensing service signature: enable features of the application.