METHOD FOR MANAGING AND CONTROLLING THE ACCESS KEYS TO SERVICES IN A COMMUNICATION SYSTEM

摘要

The method involves generating a key for a day using a root key and generating another key for another day using a new value of the generated former key. The generation operation is repeated for a limited time period in order to obtain a chain of keys, where the keys provide access to a service provided in a communication system. The keys are sent to users or receivers having a confidence level. An independent claim is also included for a system for managing a service key.