Copyright control system

Claim 2

A copyright control system, comprising: decryption means which accepts encrypted copyright digital information and decrypts said encrypted digital information using a decryption key obtained from a copyright control center for primary utilization of said encrypted digital information; and encryption means for accepting decryoted copyright digital information from said decryption means and encrypting said digital information using an encryption key obtained from a copyright control center for secondary utilization of said digital information.

Claim 3

The copyright control system according to claim 1, further comprising: first information processing means to implement at least one of display, process and edit of said digital information decrypted by said decryption means.

Claim 4

The copyright control system according to claim 1, further comprising: a second information processing means to perform at least one of communication, broadcast, storage and copy of said digital information encrypted by said encryption means.

Claim 5

The copyright control system according to claim 1, further comprising: central information processing unit and a main data bus directly connected to said central information processing unit, said decryption means being coupled to said main data bus.

Claim 6

A copyright control system comprising: a central information processing unit; a main data bus directly connected to said central information processing unit; an auxiliary memory; network connection unit; a sub-data bus coupled to said auxiliary memory and said network connection unit; decryption means which accepts encrypted copyright digital information and decrypts said encrypted digital information using a decryption key obtained from a copyright control center for primary utilization of said encrypted digital information; and encryption means for accepting decrypted copyright digital information from said decryption means and encrypting said digital information using an encryption key obtained from a copyright control center for secondary utilization of said digital information, said decryption means being coupled to said sub-data bus said decryption means also being coupled to said sub-data bus and interposed between said main data bus and said sub-data bus to provide a gateway between said central information processing unit and said auxiliary memory and between central information processing unit and said network connection.

Claim 7

A copyright control system comprising: a central information processing unit; a main data bus directly connected to said central information processing unit; an auxiliary memory; network connection unit; a sub-data bus coupled to said auxiliary memory and said network connection unit; decryption means which accepts encrypted copyright digital information and decrypts said encrypted digital information using a decryption key obtained from a copyright control center for primary utilization of said encrypted digital information; and encryption means for accepting decrypted copyright digital information from said decryption means and encrypting said digital information using an encryption key obtained from a copyright control center for secondary utilization of said digital information, said decryption means being coupled to said sub-data bus said decryption means also being coupled to said sub-data bus and interposed between said main data bus and said sub-data bus to provide a gateway between said central information processing unit and said auxiliary memory and between central information processing unit and said network connection.

Claim 8

The copyright control system according to claim 1, wherein said decryption means and said encryption means are incorporated in an LSI.

Claim 9

The copyright control system according to claim 1, wherein said decryption means and said encryption means are incorporated in an extended board.

Claim 10

The copyright control system according to claim 1, wherein said decryption means and said encryption means are provided in a PC card.

Claim 11

The copyright control system according to claim 1, further comprising a central information processing unit and a main data bus directly connected to said central information processing unit, said encryption means being coupled to said main data bus.

Claim 12

The copyright control system according to claim 9, further comprising an auxiliary memory, a network connection unit and a sub-data bus coupled to said auxiliary memory and said network connection unit, said encryption means being coupled to said sub-data bus and interposed between said main data bus and said sub-data bus to provide a gateway between said central information processing unit and said auxiliary memory and between central information processing unit and said network connection.

Claim 13

The copyright control system according to claim 5, wherein said encryption means and said decryption means are incorporated in an LSI.

Claim 14

The copyright control system according to claim 5, wherein said encryption means and said decryption means are incorporated in an extended board.

Claim 15

The copyright control system according to claim 5, wherein said encryption means and said decryption means are provided in a PC card.

Claim 18

The method of controlling primary and secondary copyrights according to claim 14, further comprising the steps of: displaying, processing or editing the decrypted digital information decrypted by said decrypting step.

Claim 19

The method of controlling primary and secondary copyrights according to claim 14, further comprising the steps of: communicating, broadcasting, storing or copying the digital information encrypted by said encrypting step.