| 摘要 |
A method of quantum cryptography using blind photon polarization quibits with multiple stages is provided to assure safety from all quantum cryptography attack methods, by rotating photon polarization quibits irregularly during a transmission and reception stage by using more than two photon quibits. In a method of quantum cryptography, a transmitter(10) rotates polarization of a single photon or photon quibits in a random angle and then transmits the photon or photon quibits to a receiver(20). The receiver rotates the photon or the photon quibits in a random angle(A) again, and then transmits the photon or the photon quibits to the transmitter. The transmitter rotates the photon or the photon quibits in a reverse angle of the rotation, and rotates the photon or the photon quibits in a B angle if a code to be transmitted is an information bit 0, or rotates the photon or the photon quibits in an angle of (B+pi/2) if the code is an information bit 1, and then transmits the photon or the photon quibits to the receiver again. The receiver rotates the polarization in an angle of -(A+B), and obtains an information signal by reading an angle corresponding to the information bit 0 or 1 finally. It is checked whether accurate information is transferred between the transmitter and the receiver.
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