Patent ID: 6510519
Filing Date: 2003-01-21
Classification: H04J,H04L,H04N

Abstract:
A method of decrypting an encrypted instance of service, the method being carried out in a receiver that has a public key-private key pair, and the method comprising the steps of:receiving in the receiver a management message having an encrypted multi-session key, wherein the encrypted multi-session key was encrypted by the public key of the receiver; decrypting the encrypted multi-session key with the private key of the receiver; storing the multi-session key in a memory of the receiver; receiving in the receiver a control message together with a service message, the service message having an encrypted portion of the instance of service, the control message including a decryptor; implementing the decryptor of the control message with the multi-session key to produce a session key; and decrypting the encrypted portion of the instance of service of the service message using the session key.