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Proceedings Paper

Cryptography and system state estimation using polarization states
Author(s): Subhash Kak; Pramode Verma; Greg MacDonald
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Paper Abstract

We present new results on cryptography and system state estimation using polarization states of photons. Current quantum cryptography applications are based on the BB84 protocol which is not secure against photon siphoning attacks. Recent research has established that the information that can be obtained from a pure state in repeated experiments is potentially infinite. This can be harnessed by sending a burst of photons confined to a very narrow time window, each such burst containing several bits of information. The proposed method represents a new way of transmitting secret information. While polarization shift-keying methods have been proposed earlier, our method is somewhat different in that it proposes to discover the polarization state of identical photons in a burst from a laser which codes binary information. We also present results on estimating the state of a system based on the polarization of the received photons which can have applications in intrusion detection.

Paper Details

Date Published: 28 September 2011
PDF: 9 pages
Proc. SPIE 8121, The Nature of Light: What are Photons? IV, 81210M (28 September 2011);
Show Author Affiliations
Subhash Kak, Oklahoma State Univ. (United States)
Pramode Verma, The Univ. of Oklahoma, Tulsa (United States)
Greg MacDonald, The Univ. of Oklahoma, Tulsa (United States)

Published in SPIE Proceedings Vol. 8121:
The Nature of Light: What are Photons? IV
Chandrasekhar Roychoudhuri; Andrei Yu. Khrennikov; Al F. Kracklauer, Editor(s)

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