To permit audience irrelevantly to a player itself by judging whether 1st individual authentication information which is stored matches 2nd individual authentication information which is inputted from outside, and loading and reproducing package media only when they match each other.

An optical disk 10030 is mounted on a player 10000, an authentication ring 10050 is put close to the player 10000, and the noncontact IC chip and an authenticating circuit 10040 of the player begin to communicate with each other. The authentication ID entered into the noncontact IC chip is transferred to the IC chip 10030 on the optical disk 10030 through the player 10000 and the IC chip 10030 authenticates the received ID and ID in its memory and sends a deciphering key for data entered into the optical disk 10030. The player 10000 reproduces readout information from the optical disk 10030 by using the deciphering key.