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Method for preventing the falsification of access cards

  • US 20030131254A1
  • Filed: 01/04/2002
  • Published: 07/10/2003
  • Est. Priority Date: 01/04/2002
  • Status: Abandoned Application
First Claim
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1. Method for preventing the falsification of access cards containing plain text information that identifies the type of authorization, whereby the plain text information is encoded by applying a key and the resulting code is introduced onto the access card.

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