Method for securing content on a recording medium and a recording medium storing content secured by the method
First Claim
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1. A recording medium storing data, the data comprising:
- encrypted content data; and
a resultant value obtained by applying a hash function to the encrypted content data.
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Abstract
The present invention relates to a method for securing content on a recording medium. Input content data are encrypted and recorded on a recording medium. A resultant value obtained by applying a hash function to the content data recorded after encryption is recorded on the recording medium for validation of the content. According to the present invention, once hashing operation for validation of content is carried out after encryption of content data is done, an apparatus for reproducing a recording medium storing content can easily check the validity of stored content by carrying out hashing operation only.
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13 Claims
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1. A recording medium storing data, the data comprising:
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encrypted content data; and
a resultant value obtained by applying a hash function to the encrypted content data. - View Dependent Claims (2, 3, 4)
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5. A method for recording data on a recording medium, comprising:
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encrypting input content data and recording the encrypted data on the recording medium; and
recording a value on the recording medium, the value being obtained by applying a hash function to the encrypted content data. - View Dependent Claims (6, 7, 8)
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9. A method for reproducing encrypted content data recorded on a recording medium, comprising:
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applying a hash function to the encrypted content data recorded; and
comparing a resultant value obtained from said applying step with information recorded on the recording medium, and determining validity of the recorded content data based on the comparison. - View Dependent Claims (10, 11, 12, 13)
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Specification