Method and apparatus for enabling physical layer secret key generation
First Claim
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1. A method for generating a physical layer security key, the method comprising:
- at a first location, making local channel impulse response (CIR) measurements and associating them with local timestamps;
at the first location, receiving timestamps from a second location, the received timestamps being associated with remote channel impulse response (CIR) measurements at the second location;
at the first location, selecting a local timestamp of the local timestamps and associated local CIR measurement of the local CIR measurements using one of the received timestamps;
at the first location, post-processing the selected local CIR measurement at the first location, selecting at least one sample from the post-processed CIR measurement; and
at the first location, generating a physical layer secret key from the at least one selected sample wherein the one of the received timestamps is associated with a CIR measurement at the second location and wherein the selected local CIR measurement at the first location is thus paired with the CIR measurement at the second location.
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Abstract
A method and apparatus for generating physical layer security keys is provided. Channel impulse response (CIR) measurements are recorded. Each CIR measurement is associated with a time-stamp. Where possible, the time-stamps are paired with time-stamps that are associated with another plurality of CIR measurements. The CIR data associated with the paired time-stamps is aggregated. Each of the aggregated CIR measurements is aligned, and at least one CIR measurement is selected for use in secret key generation.
32 Citations
14 Claims
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1. A method for generating a physical layer security key, the method comprising:
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at a first location, making local channel impulse response (CIR) measurements and associating them with local timestamps; at the first location, receiving timestamps from a second location, the received timestamps being associated with remote channel impulse response (CIR) measurements at the second location; at the first location, selecting a local timestamp of the local timestamps and associated local CIR measurement of the local CIR measurements using one of the received timestamps; at the first location, post-processing the selected local CIR measurement at the first location, selecting at least one sample from the post-processed CIR measurement; and at the first location, generating a physical layer secret key from the at least one selected sample wherein the one of the received timestamps is associated with a CIR measurement at the second location and wherein the selected local CIR measurement at the first location is thus paired with the CIR measurement at the second location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wireless transmit/receive unit (WTRU) for generating physical layer security keys, the WTRU comprising:
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a channel impulse response (CIR) measurement unit configured to generate a first plurality of local CIR measurements, wherein each local CIR measurement is associated with a time-stamp; a time-stamp pairing unit configured to identify a pair of timestamps, wherein one of the pair of timestamps is a local timestamp and another of the pair of timestamps is a remote timestamp and the local time-stamp is associated with a selected local CIR measurement in the plurality of local CIR measurements, and the remote time-stamp is associated with a remote CIR measurement wherein the selected local CIR measurement is thus paired with the remote CIR measurement at the remote location; a CIR post-processing unit configured to post process the selected local CIR measurement; a data selection unit configured to select at least one sample from the post-processed CIR measurement; and a secret key generation unit configured to generate a physical layer secret key from the at least one selected sample. - View Dependent Claims (14)
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Specification