Patent ID: 7836507
Filing Date: 2010-11-16
Classification: H04L

Abstract:
1. A contents transmitter apparatus configured for transmitting copy protected contents to a content receiver apparatus comprising: an authentication circuit configured for executing authentication of the contents receiver apparatus using equipment information received from the contents receiver apparatus, and transmitting key information to the contents receiver apparatus, so as to decrypt encrypted contents to be transmitted to the contents receiver apparatus; a timer circuit configured for measuring a first time after predetermined information is transmitted to the contents receiver apparatus until a response to the predetermined information is received from the contents receiver apparatus to determine whether the contents receiver apparatus is located within a region of personal use, and a second time after the equipment information of the contents receiver apparatus is registered by a registration circuit; the registration circuit being configured for registering the equipment information when the authentication becomes successful and the measured first time does not exceed a first predetermined time, and for deleting the equipment information of the contents receiver apparatus when the measured second time exceeds a second predetermined time; and a content transmitter circuit configured for encrypting the contents and sending out encrypted contents to the content receiver apparatus with a copy control information of the contents, wherein: the authentication circuit transmits the key information to the contents receiver apparatus when the authentication becomes successful and the equipment information is registered in the registration circuit; and the authentication circuit transmits the predetermined information and/or an authentication request that indicates that number of apparatuses through which the predetermined information and/or the authentication request pass so that the authentication circuit limits the number of apparatuses through which the predetermined information and/or the authentication request pass.