METHOD, DEVICE AND SYSTEM FOR DISTRIBUTING LICENSE REVOCATION INFORMATION FOR DEVICES HAVING A SPORADIC NETWORK CONNECTION OR NONE AT ALL

摘要

Method for revoking a licence already created for a device (23), comprising the method steps of: – putting the device (23) into an expectation state, during which the device (23) expects revocation information (21d, 22d) signed with an expected signature (21e, 22e), wherein the revocation information (21d, 22d) identifies revoked licenses; – putting the device (23) into an unlicensed state if, after a prescribed period has elapsed, no revocation information (21d, 22d) signed with the expected signature (21e, 22e) is available on the device (23).