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Privacy protected information medium using a data compression method

  • US 5,499,293 A
  • Filed: 01/24/1995
  • Issued: 03/12/1996
  • Est. Priority Date: 01/24/1995
  • Status: Expired due to Term
First Claim
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1. A data compression/decompression method using very large lists which define a modifiable static dictionary means comprising a primary and secondary dictionary for data compression with a means for input of informational (INFO) data to a means for computing, the computing means transforms the INFO data into confidentially protected output encoded data, the output encoded data is transmitted over a data transmission means for ultimate data storage by a data storage means, the method comprising the steps of:

  • assigning a sequential primary unique identification (ID) number to each word that is a part of the input INFO data that is within the very large list of data, the ID number is equal to a pointer position for each of these words in the secondary dictionary, the secondary dictionary has a structure for these words with the following features;

    i) each word can be a single phrase that is at least one word associated therewith, ii) the length of each word and iii) the primary unique ID number;

    manipulating sequentially each of the primary unique ID numbers by a mathematical number base conversion technique that transforms the primary unique ID numbers into secondary numbers;

    using at least a first designated key code by a user of the method for encryption of the secondary numbers;

    transmitting each of the secondary encrypted numbers over the data transmission means sequentially for ultimate storage in the storage means;

    whereby the secondary encrypted numbers can be retrieved at a later time even when the modifiable primary static dictionary changes.

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