ENCRYPTION SYNCHRONISATION FOR USE WITH DATA STREAMS

摘要

A method of ensuring synchronization of the encryption of a stream of data packets from a transmission end and the decryption of the stream of data packets at a reception end. The stream is encrypted by a changing encryption key. The method is comprised of inserting at least one heart beat packet in the stream per cryptoperiod, receiving the heart beat packets at the reception end, removing the heart beat packets from the data stream at the reception end, wherein the encryption key is changed once per cryptoperiod.