A first network device is configured to receive a request for a secret key, generate the secret key, and send the secret key to a second network device, a third network device, and a wireless user device. The second network device may send content, encrypted with the secret key, to the wireless user device. The third network device may send content, encrypted with the secret key, to the wireless user device when the second network device is not sending content to the wireless user device. The wireless user device may use the secret key to decrypt the content received from the second network device or the third network device.