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Method for encoding and decoding confidential optical disc

  • US 7,533,421 B2
  • Filed: 09/19/2003
  • Issued: 05/12/2009
  • Est. Priority Date: 09/19/2003
  • Status: Active Grant
First Claim
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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, andcreating 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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