Method of securing access to a user having an enhanced security proximity token
First Claim
1. A method of determining proximity of a user (11) having a first electronic device (12) to a second electronic device (14) for allowing the user (11) access to the second electronic device (14), said method comprising the steps of:
- partitioning data (44) stored within the second electronic device (14) into a plurality of data blocks (48), (50), (52) for transmittance of the data blocks (48), (50), (52) over wireless connections to the first electronic device (12);
spreading the plurality of data blocks (48), (50), (52) over a plurality of radio frequencies (f1, f2, f3) such that each of the data blocks (48), (50), (52) is transmitted at a different of the frequencies (f1, f2, f3) for secure transmission between the first electronic device (12) and the second electronic device (14);
transmitting the data blocks (48), (50), (52) in a plurality of signals at the different frequencies (f1, f2, f3) to establish communication between the first electronic device (12) and the second electronic device (14);
detecting the plurality of signals at the different frequencies with the first electronic device (12);
measuring a signal strength for each of a predetermined number of the detected plurality of signals at the different frequencies (f1, f2, f3);
determining an overall signal strength from the predetermined number of measured signal strengths and comparing the overall signal strength to a predetermined threshold; and
enabling the second electronic device (14) in response to the overall signal strength being above the predetermined threshold and disabling the second electronic device (14) in response to the overall signal strength being below the predetermined threshold.
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Accused Products
Abstract
The subject invention provides a method to determine the proximity of a user (11) having a first electronic device (12) to a second electronic device (14) for allowing the user (11) access to the second electronic device (14). The method includes the steps of transmuting data (44) in a plurality of signals at different frequencies to establish communication between the first electronic device (12) and the second electronic device (14). The method further includes detecting the plurality of signals at the different frequencies with the first electronic device (12). The method is characterized by determining an overall signal strength from the predetermined number of measured signals strengths and comparing the overall signals strength to a predetermined threshold for enabling the second electronic device (14) in response to the overall signal strength being above the predetermined threshold. The subject invention allows for increased security for systems that communicate via frequency hopping spread spectrum by determining the overall signal strength from the measuring of multiple signals detected at different frequencies.
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Citations
15 Claims
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1. A method of determining proximity of a user (11) having a first electronic device (12) to a second electronic device (14) for allowing the user (11) access to the second electronic device (14), said method comprising the steps of:
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partitioning data (44) stored within the second electronic device (14) into a plurality of data blocks (48), (50), (52) for transmittance of the data blocks (48), (50), (52) over wireless connections to the first electronic device (12);
spreading the plurality of data blocks (48), (50), (52) over a plurality of radio frequencies (f1, f2, f3) such that each of the data blocks (48), (50), (52) is transmitted at a different of the frequencies (f1, f2, f3) for secure transmission between the first electronic device (12) and the second electronic device (14);
transmitting the data blocks (48), (50), (52) in a plurality of signals at the different frequencies (f1, f2, f3) to establish communication between the first electronic device (12) and the second electronic device (14);
detecting the plurality of signals at the different frequencies with the first electronic device (12);
measuring a signal strength for each of a predetermined number of the detected plurality of signals at the different frequencies (f1, f2, f3);
determining an overall signal strength from the predetermined number of measured signal strengths and comparing the overall signal strength to a predetermined threshold; and
enabling the second electronic device (14) in response to the overall signal strength being above the predetermined threshold and disabling the second electronic device (14) in response to the overall signal strength being below the predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification