Method of quantum cryptography using blind photon polarization quibits with multiple stages
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United States of America Patent
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Feb 28, 2012
Grant Date -
Jun 11, 2009
app pub date -
Jul 7, 2006
filing date -
Jul 8, 2005
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Abstract
A cryptography method using a quantum phenomenon, which performs a multi-staged polarization process between a transmitter and a receiver to prevent a third party from knowing the polarization value of a photon. A transmitter rotates a photon flux by arbitrary angle θ and transmits it to a receiver. The receiver rotates the received photon flux by arbitrary angle φ and transmits it to the transmitter. The transmitter rotates the received photon flux by the reverse angle −θ of an angle, by which the transmitter 10 rotated it, then rotates it by polarization corresponding to an information bit, and transmits it to the receiver which rotates the received photon flux by the reverse angle −φ of an angle, and measures the polarization of the photon flux corresponding to the information bit, and recovers the information bit transmitted by the transmitter. Cryptography information may be transmitted using a plurality of photon fluxes.
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