Signal processing system, recording method, program, recording medium, reproduction device and information processing device
First Claim
1. A signal processing system having a reproducing apparatus for reading information from a recording medium having information unique thereto and an information processing apparatus for mutually authenticating and connecting the reproducing apparatus through a transferring portion, wherein the reproducing apparatus comprises:
- final encryption key generating means for generating a content information encryption key in accordance with intermediate key information;
a first transmitting portion for transmitting the intermediate key information to the information processing/apparatus through the transferring portion; and
a second transmitting portion for transmitting the content information encryption key to the information processing apparatus through the transferring portion, and wherein the information processing apparatus comprises;
a content information encrypting portion for encrypting content information using the content information encryption key;
an intermediate key information encrypting portion for encrypting the intermediate key information using key information unique to the recording medium, the key information being generated in accordance with information unique to the recording medium; and
a recording portion for recording the encrypted content information and the encrypted intermediate key information to the recording medium.
2 Assignments
0 Petitions
Accused Products
Abstract
A recorder is composed of a drive 102 and a host 103 that mutually authenticate each other. A C2_G 141 of the drive 102 calculates a medium ID and a medium key and obtains a medium unique key. The medium unique key is encrypted using a session key Ks generated by the mutual authentication and transferred to the host 103. A title key generated by a random number generator 143 of the drive 102 is transferred to the host 103. A content key calculated by a C2_G 145 of the drive 102 using the title key and the CCI 232 is encrypted using the session key Ks and then transferred to the host 103. A content is encrypted using a content key decrypted by the host 103. The drive 102 records the encrypted content, the encrypted title key, and the CCI 232 to the medium 101.
41 Citations
15 Claims
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1. A signal processing system having a reproducing apparatus for reading information from a recording medium having information unique thereto and an information processing apparatus for mutually authenticating and connecting the reproducing apparatus through a transferring portion, wherein the reproducing apparatus comprises:
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final encryption key generating means for generating a content information encryption key in accordance with intermediate key information;
a first transmitting portion for transmitting the intermediate key information to the information processing/apparatus through the transferring portion; and
a second transmitting portion for transmitting the content information encryption key to the information processing apparatus through the transferring portion, and wherein the information processing apparatus comprises;
a content information encrypting portion for encrypting content information using the content information encryption key;
an intermediate key information encrypting portion for encrypting the intermediate key information using key information unique to the recording medium, the key information being generated in accordance with information unique to the recording medium; and
a recording portion for recording the encrypted content information and the encrypted intermediate key information to the recording medium. - View Dependent Claims (2)
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3. A recording method of a reproducing apparatus and an information processing apparatus for recording information to a recording medium, the reproducing apparatus being configured to read information from the recording medium having information unique thereto and the information processing apparatus being configured to mutually authenticate and connect the reproducing apparatus through a transferring portion, the recording method comprising the steps of:
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causing the reproducing apparatus to generate a content information encryption key in accordance with intermediate key information;
causing the reproducing apparatus to transmit the intermediate key information to the information processing apparatus through the transferring portion;
causing the reproducing apparatus to transmit the content information encryption key to the information processing apparatus through the transferring portion;
causing the information processing apparatus to encrypt content information using the content information encryption key;
causing the information processing apparatus to encrypt the intermediate key information using key information unique to the recording medium, the key information being generated in accordance with information unique to the recording medium; and
causing the information processing apparatus to record the encrypted content information and the encrypted intermediate key information to the recording medium. - View Dependent Claims (4)
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5. A program of a reproducing apparatus and an information processing apparatus for recording information to a recording medium, the reproducing apparatus being configured to read information from the recording medium having information unique thereto and the information processing apparatus being configured to mutually authenticate and connect the reproducing apparatus through a transferring portion, the program comprising the steps of:
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causing the reproducing apparatus to generate a content information encryption key in accordance with intermediate key information;
causing the reproducing apparatus to transmit the intermediate key information to the information processing apparatus through the transferring portion;
causing the reproducing apparatus to transmit the content information encryption key to the information processing apparatus through the transferring portion;
causing the information processing apparatus to encrypt content information using the content information encryption key;
causing the information processing apparatus to encrypt the intermediate key information using key information unique to the recording medium, the key information being generated in accordance with information unique to the recording medium; and
causing the information processing apparatus to record the encrypted content information and the encrypted intermediate key information to the recording medium. - View Dependent Claims (6)
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7. A recording medium for storing a program-of a reproducing apparatus and an information processing apparatus for recording information to a recording medium, the reproducing apparatus being configured to read information from the recording medium having information unique thereto and the information processing apparatus being configured to mutually authenticate and connect the reproducing apparatus through a transferring portion, the program comprising the steps of:
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causing the reproducing apparatus to generate a content information encryption key in accordance with intermediate key information;
causing the reproducing apparatus to transmit the intermediate key information to the information processing apparatus through the transferring portion;
causing the reproducing apparatus to transmit the content information encryption key to the information processing apparatus through the transferring portion;
causing the information processing apparatus to encrypt content information using the content information encryption key;
causing the information processing apparatus to encrypt the intermediate key information using key information unique to the recording medium, the key information being generated in accordance with information unique to the recording medium; and
causing the information processing apparatus to record the encrypted content information and the encrypted intermediate key information to the recording medium. - View Dependent Claims (8)
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9. A reproducing apparatus, connected to an information processing apparatus through a transferring portion, for reading information from a recording medium having information unique thereto, the reproducing apparatus comprising:
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final encryption key generating means for generating a content information encryption key in accordance with intermediate key information;
a first transmitting portion for transmitting the intermediate key information to the information processing apparatus through the transferring portion;
a second transmitting portion for transmitting the content information encryption key to the information processing apparatus through the transferring portion, wherein the reproducing apparatus is mutually authenticated with the information processing apparatus and connected thereto, the information processing apparatus comprising a content information encrypting portion for encrypting content information using the content information encryption key;
an intermediate key information encrypting portion for encrypting the intermediate key information using key information unique to the recording medium, the key information being generated in accordance with information unique to the recording medium; and
a recording portion for recording the encrypted content information and the encrypted intermediate key information to the recording medium. - View Dependent Claims (10)
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11. An information processing apparatus connected to a reproducing apparatus through a transferring portion, the reproducing apparatus being configured to read information from a recording medium having information unique thereto, the information processing apparatus being mutually authenticated with the reproducing apparatus and connected thereto through the transferring portion, the reproducing apparatus comprising final encryption key generating means for generating a content information encryption key in accordance with intermediate key information;
- a first transmitting portion for transmitting the intermediate key information to the information processing apparatus through the transferring portion; and
a second transmitting portion for transmitting the content information encryption key to the information processing apparatus through the transferring portion, the information processing apparatus comprising;
a content information encrypting portion for encrypting content information using the content information encryption key;
an intermediate key information encrypting portion for encrypting the intermediate key information using key information unique to the recording medium, the key information being generated in accordance with information unique to the recording medium; and
a recording portion for recording the encrypted content information and the encrypted intermediate key information to the recording medium. - View Dependent Claims (12)
- a first transmitting portion for transmitting the intermediate key information to the information processing apparatus through the transferring portion; and
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13. A reproducing apparatus, comprising:
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at least one of a recording portion for recording encrypted data to a recording medium on which first information for invalidating an illegal electronic device, second information that differs in each content, third information definable for each encrypted unit, and identification data that differs in each stamper are pre-recorded and a reproducing portion for reproducing encrypted data recorded on the recording medium;
a storing portion for storing fourth information unique to a valid electronic device or application software;
a revoking processing portion for determining whether or not the forth information is information unique to a valid electronic device or application software using the first information and the fourth information;
a calculating portion for obtaining intermediate key information unique to each recording medium using the first information, the fourth information, the second information, and the identification data when the determined result of the revoking processing portion represents that the fourth information is information unique to a valid electronic device or application software; and
a transmitting portion for transmitting the intermediate key information to the final encryption key generating portion of an information processing apparatus through a transferring portion. - View Dependent Claims (14)
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15. A data processing apparatus, comprising:
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an authenticating portion for authenticating a recording and reproducing apparatus, the recording and reproducing apparatus having fourth information unique to a valid electronic device or application software, for at least recording encrypted data to a recording medium on which first information for invalidating an illegal electronic device, second information that differs in each content, third information definable for each encrypted unit, and identification data that differs in each stamper are pre-recorded or reproducing encrypted data recorded on the recording medium;
a key information decrypting portion for receiving the first information, the fourth information, and intermediate key information from the recording and reproducing apparatus and decrypting the intermediate key information, the first information and the forth information having been encrypted using a session key generated when the authentication has been successfully performed, the intermediate key information being unique to each recording medium and generated using the second information and the identification data;
a final encryption key generating portion for generating a final encryption key using the third information received from the recording and reproducing apparatus and the decrypted intermediate key information; and
an encrypting and decrypting portion for at least encrypting data using the final encryption key or decrypting data using the final encryption key.
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Specification