Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
141 words
An anti-tapping system in which a center distributes program signals to a plurality of terminals, together with a reception permitting data based on an address of a respective terminal, and in the respective terminal, the reception of a desired program is permitted when an address sent from the center coincides with the address of the respective terminal, the respective terminal comprising: means for generating an inherent address, and means for generating an auxiliary address to be attached to said inherent address in response to an auxiliary address generation request signal sent from the center, wherein said center comprises: means for transmitting said auxiliary address generation request signal to the respective terminal based on the inherent address of the respective terminal, and means for transmitting said reception permitting data to the respective terminal based on the inherent address and the auxiliary address.
Claim 2
Dependent Claim
141 words
An anti-tapping system in which a center distributes program signals to a plurality of terminals, together with a reception permitting data based on an address of a respective terminal, and in the respective terminal, the reception of a desired program is permitted when an address sent from the center coincides with the address of the respective terminal, the respective terminal comprising: means for generating an inherent address, and means for generating an auxiliary address to be attached to said inherent address in response to an auxiliary address generation request signal sent from the center, wherein said center comprises: means for transmitting said auxiliary address generation request signal to the respective terminal based on the inherent address of the respective terminal, and means for transmitting said reception permitting data to the respective terminal based on the inherent address and the auxiliary address.
Claim 3
Dependent Claim
17 words
A system as set forth in claim 1 wherein said auxiliary address generator generates a pseudo number.
Claim 4
Dependent Claim
70 words
A system as set forth in claim 1 wherein said means for generating the inherent address of a terminal comprises means for generating an initial address inherent to each terminal and a register means for storing an address offset sent from the center for imparting an offset to said initial address, and said center further comprises means for transmitting an address offset to a terminal based on the initial address.
Claim 5
Dependent Claim
48 words
A system as set forth in claim 5 wherein said generation request signal transmitting means provided in the center transmits said generation request signal to any one of said terminals at a time when a duplication of the inherent address of the terminal is detected by the center.
Claim 6
Dependent Claim
40 words
A system as set forth in claim 3 wherein said address offset transmitting means in the center transmits said address offset to a terminal having an initial address, when a duplication of the initial address is detected by the center.
Claim 7
Dependent Claim
45 words
A system as set forth in claim 5 wherein when duplication of the initial address and the address offset is detected, said generation request transmitting means in the center transmits the generation request signal to the terminal having the initial address and the address offset.
Claim 8
Dependent Claim
35 words
A system as set forth in claim 1 wherein said generation request transmitting means in the center transmits said generation request signal to the respective terminal at a predetermined time according to a time map.
Claim 9
Dependent Claim
31 words
A system as set forth in claim 3 wherein said address offset transmitting means transmits said address offset to the respective terminal at a predetermined time according to a time map.
Claim 10
Dependent Claim
35 words
A system as set forth in claim 5 wherein said generation request transmitting means in the center transmits said generation request signal to the respective terminal at a predetermined time according to a time map.
Claim 11
Independent Claim
27 words
A system as set forth in any of claims 1-9 wherein said reception permitting data is a descramble key code data converted based on said auxiliary address.
Claim 12
Independent Claim
20 words
A system as set forth in any of claims 1-9 wherein said reception permitting data is a channel map data.