Application server and a control method thereof, a program and a computer-readable storage medium,

Application server (100) includes a receiving means for receiving a request for media object from the user device (101), and verification means for verifying that the received request is authentic (102), it is normally required is authentic user first generation means (103), the media object the media server is encrypted and encrypted media objects requested by the session key to generate a session key associated with an existing session if it is verified to deliver towards the device, the first sending means for sending the session key to the media server (104), and second generating means for generating a one-time player session key is embedded (105), one-time second sending means for sending a player to the user equipment (106) der Thereby and a second delivery means for decrypting and decoding the encrypted media object the user equipment is sent from the media server.