Equipment for digital video disc processing information on digital video disc using prescribed information serving as key, and method and apparatus for recording prescribed information
First Claim
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1. Equipment for a digital video disc, comprising:
- a memory in which key data associated with information on a digital video disc is recorded in advance; and
means for processing the information on said digital video disc using said key data read from said memory;
wherein random data is written around said key data in said memory.
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Accused Products
Abstract
Equipment for DVD includes a flash memory in which key data associated with information on a DVD is recorded in advance, and accesses the information on the DVD using the key data read from the flash memory. The key data is recorded in advance in a specific area of the flash memory, and random data is written in advance around the key data. The key data refers to an encryption key for equipment for encrypting and recording information on the DVD or a decryption key for equipment for decrypting the information read from the DVD. Such a key is recorded, buried in the random data.
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Citations
8 Claims
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1. Equipment for a digital video disc, comprising:
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a memory in which key data associated with information on a digital video disc is recorded in advance; and
means for processing the information on said digital video disc using said key data read from said memory;
whereinrandom data is written around said key data in said memory. - View Dependent Claims (2, 3, 4)
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5. A method of recording in advance prescribed information to be protected against unauthorized access in a memory, comprising the steps of:
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writing said prescribed information in an unused area of said memory; and
writing random data in an area within said unused area adjacent to said prescribed information written in said step of writing. - View Dependent Claims (6, 7)
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8. An apparatus for recording in advance prescribed information to be protected against unauthorized access in a memory, comprising:
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means for writing said prescribed information in an unused area of said memory; and
means for writing random data in an area within said unused area adjacent to said prescribed information written in said step of writing.
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Specification