Patent ID: 8307214

Claim:
A method for restricting access to media data generated by a camera, comprising: setting a non-public initial user key, K ICU , in the camera, providing a user client with the initial user key, K ICU , establishing an authenticated relation between the user client and the camera by sending an authentication message including information based on the initial user key, K ICU , from the user client to the camera, checking if an operational user key, K OCU , is set in the camera, and performing, in response to the act of checking if the operational user key, K OCU , is set in the camera, the acts a)-d) only if the operational user key, K OCU , is not set: a) acquiring an operational user key, K OCU , b) setting the operational user key, K OCU , in the camera, c) setting the operational user key, K OCU , in the user client, and d) indicating in the camera that the operational user key, K OCU , is set, setting, in the camera, a media data encryption/decryption key associated with the operational user key, K OCU , encrypting media data registered by the camera using the media data encryption key, and sending the encrypted media data to a service provider management server.