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Systems and methods for providing conditional access to transmitted information

  • US 9,787,649 B2
  • Filed: 01/09/2016
  • Issued: 10/10/2017
  • Est. Priority Date: 09/11/2012
  • Status: Active Grant
First Claim
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1. A system for controlling access to encrypted data received from a transmitter network, and for controlling access to different estimates of a receiver'"'"'s position by one or more applications, the system comprising:

  • a processor;

    a first cryptography component; and

    a second cryptography component,wherein the first cryptography component is operable to decrypt, using a first key, encrypted data retrieved from one or more signals that were transmitted by a terrestrial transmitter,wherein the encrypted data includes data representing the terrestrial transmitter'"'"'s position coordinates, and further includes data representing an atmospheric measurement that was measured at the terrestrial transmitter,wherein the processor is operable to determine an estimate of a receiver'"'"'s position using (i) an atmospheric measurement from a sensor of the receiver and (ii) the decrypted data representing the terrestrial transmitter'"'"'s position coordinates and representing the atmospheric measurement that was measured at the terrestrial transmitter,wherein the estimate of the receiver'"'"'s position includes an estimated latitude, an estimated longitude, and an estimated altitude of the receiver'"'"'s position, andwherein the second cryptography component is operable to encrypt, using a second key associated with a first application, a first set of coordinates from the estimated latitude, the estimated longitude, and the estimated altitude that the first application is permitted to receive.

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