Controlling access to stored information based on geographical location and date and time

  • US 6,370,629 B1
  • Filed: 10/29/1998
  • Issued: 04/09/2002
  • Est. Priority Date: 10/29/1998
  • Status: Expired due to Term
First Claim
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1. A method for controlling access to stored information comprising:

  • determining an actual geographic position where said stored information is located based on signals received at a receiver supplying reliable position information;

    cryptographically signing said actual geographic position with a receiver encryption key;

    verifying the signature of said actual geographic position;

    determining that said actual geographic position is within a geographic region within which access to said stored information is authorized; and

    permitting access to said stored information.

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