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Digital content distribution system and protection method

  • US 6,751,598 B1
  • Filed: 07/02/1997
  • Issued: 06/15/2004
  • Est. Priority Date: 07/03/1996
  • Status: Expired due to Fees
First Claim
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1. A digital content protection system for reading a digital content from a server, determining whether a program is executable, and processing said digital content, comprising:

  • a drive unit for making an access to information in a storage medium mounted thereto, the storage medium having a read only storage area and a rewritable storage area;

    a digital content access permitting section, including a judging section connected to said drive unit for reading a code from a predetermined location on said storage medium and judging whether or not said code matches with a predetermined code; and

    a control section for distinguishing whether said predetermined location exists in said read only storage area or in said rewritable storage area to determine that, when said code exists in said read only storage area, said program is executable, wherein information concerning said predetermined location is included at a predetermined position in said digital content, and said storage medium has a plurality of different keys at a plurality of predetermined locations on said read only storage area designated by said predetermined position.

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