Contents transmitter apparatus, contents receiver apparatus and contents transmitting method
First Claim
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.
6 Assignments
0 Petitions
Accused Products
Abstract
For achieving the protection of copyright, by suppressing illegal copy production thereof, in particular, when transmitting contents with using a wired or wireless LAN, as well as, for preventing the transmission of contents from deviating from a range of a personal use thereof, a contents transmitter apparatus and a contents receiver apparatus make an authentication, mutually, before transmitting contents therebetween. At the time when conducting this authentication, measurement is made upon a time-period up to arrival of a receipt confirmation responding to the transmission of an authentication request or a response to the authentication; then, only in the case when this value measured does not exceed a predetermined upper value, the transmission is conducted on the contents encrypted, and at the same time, address information and equipment information unique to the apparatus are registered, thereby conducting the transmission of encrypted contents, but without conducting the time-measurement thereon, when transmitting the contents, again. Also, while conducting the time-measurement periodically, dynamic management is made on the registration information, so that the contents thereof are suitable for the network structure at the present.
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Citations
10 Claims
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1. A contents transmitter apparatus configured for transmitting copy protected contents to a content receiver apparatus comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 8)
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7. A contents transmitting method in a contents transmitter apparatus configured for transmitting copy protected contents to a contents receiver apparatus, the method comprising:
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executing authentication of the contents receiver apparatus using equipment information received from the contents receiver apparatus; 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; registering the equipment information when the authentication becomes successful and the measured first time does not exceed a first predetermined time; measuring a second time after the equipment information of the contents receiver apparatus is registered; deleting the equipment information of the contents receiver apparatus when the measured second time exceeds a second predetermined time; encrypting the contents and sending out encrypted contents to the content receiver apparatus with a copy control information of the contents; and transmitting key information to the contents receiver apparatus when the authentication becomes successful and the equipment information is registered in the registration circuit, so as to decrypt encrypted contents to be transmitted to the contents receiver apparatus, wherein the predetermined information and/or an authentication request indicates the number of apparatuses through which the predetermined information and/or an authentication request pass so that the contents transmitter apparatus limits the number of apparatus through which the predetermined information and/or the authentication request pass. - View Dependent Claims (9, 10)
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Specification