A system comprising: a terminal having a broadcast control function, and a first identity device attached to the terminal via a port, and a second identity device, the terminal comprising: a controller capable of setting a terminal broadcast viewing level of the terminal, previously set by the first identity device according to a second broadcast viewing level obtained from the second identity device, when the second identity device replaces the first identity device, wherein the controller is adapted to set the broadcast viewing level using the second identity device in accordance with a selection made by a user; wherein the controller is adapted to maintain the broadcast viewing level of the terminal previously set using the second identity device if a password input by a user after replacing the first identity device with the second identity device matches a password set in the first identity device, and wherein the controller is adapted to maintain the broadcast viewing level of the terminal previously set using the first identity device if the password input by the user does not match the password set in the first identity device. a terminal having a broadcast control function, and a first identity device attached to the terminal via a port, and a second identity device, the terminal comprising: a controller capable of setting a terminal broadcast viewing level of the terminal, previously set by the first identity device according to a second broadcast viewing level obtained from the second identity device, when the second identity device replaces the first identity device, wherein the controller is adapted to set the broadcast viewing level using the second identity device in accordance with a selection made by a user; wherein the controller is adapted to maintain the broadcast viewing level of the terminal previously set using the second identity device if a password input by a user after replacing the first identity device with the second identity device matches a password set in the first identity device, and wherein the controller is adapted to maintain the broadcast viewing level of the terminal previously set using the first identity device if the password input by the user does not match the password set in the first identity device. a controller capable of setting a terminal broadcast viewing level of the terminal, previously set by the first identity device according to a second broadcast viewing level obtained from the second identity device, when the second identity device replaces the first identity device, wherein the controller is adapted to set the broadcast viewing level using the second identity device in accordance with a selection made by a user; wherein the controller is adapted to maintain the broadcast viewing level of the terminal previously set using the second identity device if a password input by a user after replacing the first identity device with the second identity device matches a password set in the first identity device, and wherein the controller is adapted to maintain the broadcast viewing level of the terminal previously set using the first identity device if the password input by the user does not match the password set in the first identity device.