RECONFIGURABLE ANTENNA BASED SOLUTIONS FOR DEVICE AUTHENTICATION AND INTRUSION DETECTION IN WIRELESS NETWORKS
First Claim
1. A method of authenticating a transmitting device in a communication system using at least one multi-mode reconfigurable antenna, comprising the steps of:
- collecting wireless channel information for different antenna modes of said at least one reconfigurable antenna for a legitimate transmitter;
combining the collected wireless channel information for different modes of said at least one reconfigurable antenna into a characteristic transmission fingerprint;
forming a detection threshold based on the characteristic transmission fingerprint for the legitimate transmitter at the outset of a communication connection;
comparing wireless channel information from a later transmission with said fingerprint based on a test metric to determine if the wireless channel information from the later transmission corresponds to said fingerprint within a designated threshold; and
identifying the transmitter of said later transmission as an intruder if said wireless channel transmission does not correspond to said fingerprint within said designated threshold.
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Accused Products
Abstract
Channel based authentication schemes for intrusion detection that operates at the physical layer are described that apply the capabilities of a pattern re-configurable antenna for improved performance. Performance gains are achieved by the schemes as a function of the number of antenna modes. The first scheme relies on a channel based fingerprint for differentiating between transmitters whereas another scheme poses the intruder detection problem as a generalized likelihood ratio (GLR) test problem that operates on the channel realizations corresponding to different modes present in a reconfigurable antenna. The benefits of these two schemes over single element antennas are demonstrated. General guidelines are provided on how to choose the different elements of the decision metric in order to realize better performance for physical layer based authentication schemes based on any diversity scheme.
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Citations
15 Claims
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1. A method of authenticating a transmitting device in a communication system using at least one multi-mode reconfigurable antenna, comprising the steps of:
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collecting wireless channel information for different antenna modes of said at least one reconfigurable antenna for a legitimate transmitter; combining the collected wireless channel information for different modes of said at least one reconfigurable antenna into a characteristic transmission fingerprint; forming a detection threshold based on the characteristic transmission fingerprint for the legitimate transmitter at the outset of a communication connection; comparing wireless channel information from a later transmission with said fingerprint based on a test metric to determine if the wireless channel information from the later transmission corresponds to said fingerprint within a designated threshold; and identifying the transmitter of said later transmission as an intruder if said wireless channel transmission does not correspond to said fingerprint within said designated threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of detecting intrusion into a wireless transmission between a transmitter and a receiver in a communication system using at least one multi-mode reconfigurable antenna, comprising:
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collecting wireless channel information between said transmitter and receiver for different antenna modes of said at least one multi-mode reconfigurable antenna at a physical layer of the antenna; monitoring the wireless channel information using a generalized likelihood ratio test; and generating an alarm when an abrupt change in the wireless channel information is detected, said abrupt change being representative of an intrusion.
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Specification