A method and medium are provided for maintaining a secure communication of a media stream as a mobile device transitions from a first network a second network. A request is received from the mobile device to initiate a secure communication with an end point. The endpoint stores a unique identifier of the mobile device and a unique key that is usable to decrypt any securely communicated data received from the mobile device. Data is securely communicated from the mobile device to the end point. The mobile device communicates a second request to securely communicate as it transitions from the first network to the second network. A source identifier is determined from the second request to identify the mobile device as the source. The unique key, previously associated with the mobile device, is utilized to decrypt any data received from the mobile device.