| US 7,533,421 B2 | ||
| Method for encoding and decoding confidential optical disc | ||
| Don Ramsey, Shindian (Taiwan) | ||
| Assigned to Cyberlink Corp., Shindian, Taipei (Taiwan) | ||
| Filed on Sep. 19, 2003, as Appl. No. 10/666,716. | ||
| Prior Publication US 2005/0066117 A1, Mar. 24, 2005 | ||
| Int. Cl. G06F 12/14 (2006.01) | ||
| U.S. Cl. 726—27 [726/2; 726/26; 726/28; 713/189; 713/193; 707/9] | 34 Claims |
| 1. A method for encoding a confidential optical disc with a burner, the method comprising the steps of:
receiving a signal for creating the confidential optical disc to switch a burner into a burning mode;
setting a data-accessing password for future verification, wherein the data-accessing password is placed to a secret file
set descriptor and allocated on any unoccupied space of an optical disc, wherein the secret file set descriptor is a non-standard
file and stores a preset address pointing to a root directory record of a real directory tree;
selecting one of data sources for public viewing and confidential viewing data to be burned on the disc;
receiving a start burn signal to begin a data encoding process;
creating a temporary file system as a buffer that includes two stages:
creating a standard file set comprising a standard file system including a dummy directory tree pointing to dummy data, wherein
the standard file system defines the next available address as the start of the secret file set descriptor, and
creating a parallel file set comprising the secret file set descriptor and the real directory tree pointing to real data;
and
burning the buffer to the optical disc to produce the confidential optical disc.
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