An Authentication Scheme For Free-Space Laser Communication Using "Fingerprint-Matching"

An authentication scheme for free-space communication with singular laser beam has been discussed. A known order of singularity was imposed on the beam, which generates its characteristic fingerprint structure. At the receiver end, in order to check that fingerprint pattern, a part of the received b...

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Bibliographic Details
Published in2020 4th International Conference on Electronics, Materials Engineering & Nano-Technology (IEMENTech) pp. 1 - 3
Main Authors Chowdhury, Subhajit Dutta, Chakraborty, Rijuparna
Format Conference Proceeding
LanguageEnglish
Published IEEE 02.10.2020
Subjects
Encoding
Fingerprint recognition
Fourier Transform
Fourier transforms
free-space communication
Interference
Laser beams
OAM
Orbits
Periodic structures
Vortex beam
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Summary:An authentication scheme for free-space communication with singular laser beam has been discussed. A known order of singularity was imposed on the beam, which generates its characteristic fingerprint structure. At the receiver end, in order to check that fingerprint pattern, a part of the received beam was first interfered with a locally generated plane wave and then Fourier transformed. This frequency distribution pattern, captured by a CCD camera, gives the final fingerprint pattern of the known order vortex beam. An application software compares this pattern with the previously stored ones and generates a 'high' signal upon successful match. This 'high' signal eventually set the final AND gate open for passing the digitized message through it.
DOI:10.1109/IEMENTech51367.2020.9270098