Authentication system and method
First Claim
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1. A method for determining a user authentication, the method comprising the steps of:
- determining a user identification based upon a wireless signal modulated by a transponder circuit in an identification token;
monitoring the signal strength of wireless signals modulated by the wireless transponder over time;
determining a pattern of movement of the identification token based upon the monitored signal strength; and
generating an authentication signal when the sensed pattern of movement of corresponds to a previously stored set of token authentication movements associated with the determined user identification.
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Abstract
Authentication systems and methods are provided. In accordance with one method, a user identification is determined based upon a signal modulated by a wireless transponder circuit in an identification token. The signal strength of signals modulated by the wireless transponder is monitored over a period of time and a pattern of movement of the identification token is determined. An authentication signal is generated when the sensed pattern of movement of corresponds to a previously stored set of token authentication movements associated with the determined user identification.
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23 Claims
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1. A method for determining a user authentication, the method comprising the steps of:
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determining a user identification based upon a wireless signal modulated by a transponder circuit in an identification token;
monitoring the signal strength of wireless signals modulated by the wireless transponder over time;
determining a pattern of movement of the identification token based upon the monitored signal strength; and
generating an authentication signal when the sensed pattern of movement of corresponds to a previously stored set of token authentication movements associated with the determined user identification. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An authentication system comprising:
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an transceiver circuit having a transmitter circuit portion to radiate a first electromagnetic signals adapted to cause a transponder in an identification token to transmit a responsive signals and a receiver circuit portion adapted to receive responsive signals from the identification token and to extract identification data from the responsive signals;
a signal strength determining circuit that is adapted to determine an intensity of the responsive signal received at the antenna, to monitor changes in the determined intensity over time and to provide a monitoring signal having data characterizing such changes;
a memory having authentication data stored therein characterizing at least one sequence of changes in the intensity of the responsive signal over time, each sequence associated with identification data; and
a control circuit adapted compare the monitoring signal data to authentication data associated with the extracted identification data and to generate an authentication signal when the monitoring signal data and the authentication data correspond. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A reader system comprising:
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at least one antenna;
a radio frequency transponder adapted to generate a first radio frequency signal that causes a radio frequency transponder that is within a range of the first radio frequency transponder to respond with a signal, said radio frequency transponder having a receiver circuit that senses the responsive signal and that determines identification data therefrom, a signal strength monitoring circuit adapted to detect the strength of responsive signals received at each of at least one antenna and to generate a signal strength signal; and
a reader control circuit adapted to cause the radio frequency transponder to generate the first radio frequency signal and a sequence of second radio frequency signals over a period of time each second radio frequency signal being adapted to cause the radio frequency transponder to generate second responsive signals;
wherein the controller receives the signal strength signal and generates signal strength data characterizing changes in the signal strength signal of the second responsive signals over the period of time, said signal strength data being usable by a remote device in determining whether an authorization signal is to be generated. - View Dependent Claims (19, 20, 21, 22)
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23. An authentication system comprising:
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a user identification means for determining the identification of a user based upon a wireless signal modulated by a transponder circuit in an identification token;
a signal strength monitoring means for monitoring the signal strength of wireless signals modulated by the wireless transponder and for determining a pattern of movement of the identification token over a period of time and;
a control means for generating an authentication signal when the sensed pattern of movement of over the period of time corresponds to a previously stored set of token authentication movements associated with the determined user identification.
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Specification