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Computer software encryption apparatus

  • US 5,007,082 A
  • Filed: 02/26/1990
  • Issued: 04/09/1991
  • Est. Priority Date: 08/03/1988
  • Status: Expired due to Fees
First Claim
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1. In a computer system having operating system software, at least a portion thereof being loaded into read/write memory, said operating system software implementing a file storage structure for storing data as individual files on different portions of a removable data storage medium, said structure including file allocation table means stored on said removable data storage medium and containing file allocation information for correlating said individual files with selected different portions of said medium in a first predetermined manner, a security system comprising:

  • means programmably linked to said potion of said operating system software loaded into read/write memory for encrypting and storing said file allocation information on said removable data storage medium in an encrypted manner different from said first predetermined manner; and

    means associated with said computer system for decrypting and using said file allocation information to correlate said individual files with said selected different portions of said medium, thereby permitting location and retrieval of data stored as files on said medium by said computer system.

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