Patent ID: 8824680

Claim:
A method comprising: receiving, by a network device of a content provider, a request for a first secret key and a second secret key, the first secret key being used to encrypt the second secret key, the second secret key being used to encrypt content being sent to a wireless user device, and the content including one of an audio stream or a video stream; generating, by the first network device and based on the request, the first secret key and the second secret key; sending, by the network device and by using a multimedia Internet KEYing (MIKEY) protocol, the first secret key and the second secret key to a first broadcast/multicast service (BM-SC) device that provides service in a first coverage area of a network, the first BM-SC device sending a first portion of the content, encrypted with the second secret key, to the wireless user device when the wireless user device is located in the first coverage area of the network; sending, by the first network device and by using the MIKEY protocol, the first secret key and the second secret key to a second BM-SC device that provides service in a second coverage area of the network, the second BM-SC device sending a second portion of the content, encrypted with the second secret key, to the wireless user device when the wireless user device is located in the second coverage area of the network, and the first coverage area of the network being different than the second coverage area of the network; and sending, by the first network device and by using the MIKEY protocol, the first secret key and the second secret key to the wireless user device, the wireless user device using the second secret key to decrypt the first portion of the content received from the first BM-SC device and the second portion of the content received from the second BM-SC device, and a user of the wireless user device being provided with the first portion of the content and the second portion of the content without interruption detectable by the user during a time when the wireless user device moves from the first coverage area of the network to the second coverage area of the network.