Information recording apparatus, information reproducing apparatus, and information distribution system
First Claim
1. A computer-implemented information recording method of encrypting contents information and storing the contents information on a storage medium, comprising:
- encrypting contents information to generate encrypted contents information;
merging (a) a first key which allows the encrypted contents information to be decoded and (b) license condition information used for determining whether the first key for decoding the contents is to be output from a decoder on a decoding side or is not to be output from the decoder on the decoding side, to produce a merged result;
encrypting the merged result by scrambling information bits in the merged result using a second key to generate a merged and encrypted result including the first key and the license condition information that are inseparably combined by the merging and the scrambling, the first key only being output from the decoder on the decoding side if it is decided by the license condition information that the first key is to be output from the decoder on the decoding side; and
storing the encrypted contents information together with the merged and encrypted result on the storage medium.
0 Assignments
0 Petitions
Accused Products
Abstract
An information recording apparatus comprises an encryption section encrypting contents information and also a license condition referred to to limit use of the contents information and a decoding key for decoding the encrypted contents information to generate license information, and a recording section recording the encrypted contents information and the generated license information on a recording medium. An information reproducing apparatus comprises a decoder unit decoding the license information recorded on the recording medium using a second decoding key for decoding the license information and deciding on the basis of the license condition contained in the decoded license information whether the contents information can be used. If it is decided that the contents information can be used, the encrypted contents information recorded on the recording medium is decoded using the first decoding key contained in the decoded license information.
23 Citations
11 Claims
-
1. A computer-implemented information recording method of encrypting contents information and storing the contents information on a storage medium, comprising:
-
encrypting contents information to generate encrypted contents information; merging (a) a first key which allows the encrypted contents information to be decoded and (b) license condition information used for determining whether the first key for decoding the contents is to be output from a decoder on a decoding side or is not to be output from the decoder on the decoding side, to produce a merged result; encrypting the merged result by scrambling information bits in the merged result using a second key to generate a merged and encrypted result including the first key and the license condition information that are inseparably combined by the merging and the scrambling, the first key only being output from the decoder on the decoding side if it is decided by the license condition information that the first key is to be output from the decoder on the decoding side; and storing the encrypted contents information together with the merged and encrypted result on the storage medium. - View Dependent Claims (2, 3, 4)
-
-
5. A computer-implemented information recording system for storing encrypted contents information on a storage medium, comprising:
-
a first encryption unit configured to encrypt contents information to generate encrypted contents information; a second encryption unit configured to merge (a) a first key which allows the encrypted contents information to be decoded and (b) license condition information used for determining whether the first key for decoding the contents is to be output from a decoder on a decoding side or is not to be output from the decoder on the decoding side, to produce a merged result, and configured to encrypt the merged result by scrambling information bits in the merged result using a second key to generate a merged and encrypted result including the first key and the license condition information that are inseparably combined by the merging and the scrambling, the first key only being output from the decoder on the decoding side if it is decided by the license condition information that the first key is to be output from the decoder on the decoding side; and a recording unit configured to store on the storage medium the encrypted contents information together with the merged and encrypted result.
-
-
6. A computer-implemented information recording apparatus for encrypting contents information and storing the contents information on a storage medium, comprising:
-
a first encrypting unit configured to encrypt contents information to generate encrypted contents information; a merging unit configured to merge (a) a first key which allows the encrypted contents information to be decoded and (b) license condition information used for determining whether the first key for decoding the contents is to be output from a decoder on a decoding side or is not to be output from the decoder on the decoding side, to produce a merged result, the first key only being output from the decoder on the decoding side if it is decided by the license condition information that the first key is to be output from the decoder on the decoding side; a second encrypting unit configured to encrypt the merged result by scrambling information bits in the merged result using a second key to generate a merged and encrypted result including the first key and the license condition information that are inseparably combined by the merging and the scrambling; and a storing unit configured to store the encrypted contents information together with the merged and encrypted result in the storage medium, the first encrypting unit using a third key corresponding to the first key to generate the encrypted contents information. - View Dependent Claims (7, 8)
-
-
9. A computer-implemented information recording method of encrypting contents information and storing the contents information on a storage medium, comprising:
-
encrypting contents information to generate encrypted contents information; merging (a) a first key which allows the encrypted contents information to be decoded and (b) license condition information used for determining whether the first key for decoding the contents is to be output from a decoder on a decoding side or is not to be output from the decoder on the decoding side and is limited to a media ID, to produce a merged result, the license condition information being referred to in order to output the first key; encrypting the merged result by scrambling information bits in the merged result using a second key to generate a merged and an encrypted result including the first key and the license condition information that are inseparably combined by the merging and the scrambling, the first key only being output from the decoder on the decoding side if it is decided by the license condition information that the first key is to be output from the decoder on the decoding side; and storing the encrypted contents information together with the merged and encrypted result on the storage medium.
-
-
10. A computer-implemented information recording method of encrypting contents information and storing the contents information on a storage medium, comprising:
-
encrypting contents information to generate encrypted contents information; encrypting (a) a first key which allows the encrypted contents information to be decoded and (b) license condition information used for determining whether the first key for decoding the contents is to be output from a decoder on a decoding side or is not to be output from the decoder on the decoding side, with these being associated with each other, by scrambling using a second key to generate an encrypted result including the first key and the license condition information that are inseparably combined by the scrambling, the first key only being output from the decoder on the decoding side if it is decided by the license condition information that the first key is to be output from the decoder on the decoding side; and storing the encrypted contents information together with the merged and encrypted result on the storage medium.
-
-
11. A computer-implemented information recording system for storing encrypted contents information on a storage medium, comprising:
-
a first encryption unit configured to encrypt contents information to generate encrypted contents information; a second encryption unit configured to encrypt (a) a first key which allows the encrypted contents information to be decoded and (b) license condition information used for determining whether the first key for decoding the contents is to be output from a decoder on a decoding side or is not to be output from the decoder on the decoding side, with these being associated with each other, by scrambling using a second key to generate an encrypted result including the first key and the license condition information that are inseparably combined by the scrambling, the first key only being output from the decoder on the decoding side if it is decided by the license condition information that the first key is to be output from the decoder on the decoding side; and a recording unit configured to store on the storage medium the encrypted contents information together with the merged and encrypted result.
-
Specification