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Marked foreign data blocks

  • US 7,720,991 B1
  • Filed: 02/26/2008
  • Issued: 05/18/2010
  • Est. Priority Date: 09/26/2001
  • Status: Active Grant
First Claim
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1. A computer-implemented method for embedding a foreign data block in a host data file, comprising:

  • receiving a host data file, the host data file having a host data file format;

    receiving a packet to be embedded into the host data file, the packet including a foreign data block and further including a header and a trailer that delimit the foreign data block, the header including an identifier designed to be distinguishable from all other data in the host data file, a byte pattern that indicates a presence of the header, and a character encoding format of the foreign data block, the byte pattern selected based on the character encoding format of the foreign data block; and

    embedding the packet in the host data file;

    whereby the foreign data block is identifiable, extractable, and modifiable by computer programs not configured to recognize the host file data format.

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