| 摘要 |
<p>The method involves sending management data in a form of authorization message encrypted by a synchronization key, where the authorization message contains time information. The authorization message is repeated cyclically and is intended for a multimedia unit or a group of multimedia units, where the synchronization key is modified during each cycle. The synchronization key is modified after the encryption of the determined number of authorization messages, where the number is lower than or equal to the number of messages forming the cycle.</p> |
