Recording Apparatus and Recording Medium
First Claim
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1. A recording apparatus comprises:
- an encryption/decryption section for encrypting first and second contents obtained from the same content, using first and second keys, respectively, and outputting the results as first and second encrypted contents, respectively; and
a recording medium,wherein the encryption/decryption section encrypts the first and second keys using the second and first keys, respectively, and outputs the results as first and second encrypted keys, respectively, to the recording medium, andthe recording medium records the first and second encrypted contents and the first and second encrypted keys.
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Abstract
A recording apparatus includes an encryption/decryption section for encrypting first and second contents obtained from the same content, using first and second keys, respectively, and outputting the results as first and second encrypted contents, respectively, and a recording medium. The encryption/decryption section encrypts the first and second keys using the second and first keys, respectively, and outputs the results as first and second encrypted keys, respectively, to the recording medium. The recording medium records the first and second encrypted contents and the first and second encrypted keys.
41 Citations
19 Claims
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1. A recording apparatus comprises:
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an encryption/decryption section for encrypting first and second contents obtained from the same content, using first and second keys, respectively, and outputting the results as first and second encrypted contents, respectively; and a recording medium, wherein the encryption/decryption section encrypts the first and second keys using the second and first keys, respectively, and outputs the results as first and second encrypted keys, respectively, to the recording medium, and the recording medium records the first and second encrypted contents and the first and second encrypted keys. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A recording medium, wherein
first and second encrypted contents obtained by encrypting first and second contents obtained from the same content, using first and second keys, respectively, and first and second encrypted keys obtained by encrypting the first and second keys, respectively, are recorded, and the first encrypted key is obtained by encrypting the first key using a part of the second key.
Specification