Method for protecting data recorded on a partial read-only memory (ROM) medium from unauthorized copying
AssigneeNEC Corporation
InventorMasaki Itoh
Life of this patent
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Abstract
A method and apparatus for preventing generation of third generation data of an original data recorded on a read-only region of a partial read-only memory (ROM) optical disk includes an operation for copying source data from the partial read-only memory to a read-write medium by first attempting to write check data on a read-write region of the partial ROM optical disk. If the check data cannot be written, the copy operation terminates. If the check data can be written, the source data is overwritten. Then, the source data is copied from the partial ROM optical disk to the read-write medium.
Claims8
An apparatus for copying source data from a first medium to a second medium, said first medium including first and second regions, said source data being recorded on said second region of said first medium, said apparatus comprising:
- write-state determining means for determining whether said first medium is in a write-enable state;
- copy means for copying said source data from said first medium to said second medium when said write-state determining means determines that said first medium is in said write-enable state;
- and
- overwriting means for overwriting said source data after said copy means copies said source data.
Dependencies are inferred from the claim text.