Method for protecting data recorded on a partial read-only memory (ROM) medium from unauthorized copying
AssigneeNEC Corporation
InventorMasaki Itoh
Life of this patent
Estimating the term…
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.
Claims9
A method 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 method comprising steps of:
- (a) attempting to write check data on said first region of said first medium;
- (b) terminating said method when said check data cannot be written on said first region, but writing said check data on said first region of said first medium when said check data can be written;
- (c) overwriting said source data;
- and
- (d) copying said source data from said first medium to said second medium.
A method 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 method comprising steps of:
- (a) attempting to write check data on said first region of said first medium;
- (b) terminating said method when said check data cannot be written on said first region, but writing said check data on said first region of said first medium when said check data can be written;
- (c) copying said source data from said first medium to said second medium;
- and
- (d) overwriting said source data on said second region of said first medium.
Dependencies are inferred from the claim text.