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Rearrangement Encryption Based on GHZ State for Quantum Key Distribution Protocal and the Security of a Quantum Secret Sharing

Author: CheWeiHong
Tutor: ZuoFengLi
School: Hebei Normal
Course: Theoretical Physics
Keywords: Encryption Quantum key distribution Decrypt the way Quantum secret sharing
CLC: O431.2
Type: Master's thesis
Year: 2009
Downloads: 66
Quote: 0
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Abstract


With the rapid development of information science , quantum information science came into being. Of this thesis is to quantum information science as a starting point, to describe their basic theory . Elaborated on several applications of quantum entanglement plays an important role in quantum information . And do further work in some applications . This paper gives a new one based on the the GHZ state 's control order rearrangement encryption - quantum key distribution protocol . The agreement by shuffling the GHZ entangled states of three-photon the corresponding associated with the order , thus completing the secure transfer of key . The agreement of each control code corresponding GHZ entangled state under the control of a three associated particles can be transmitted In this case , each GHZ state can send three bits of secret information . Needless to consider not only how to store these states , so that the the particle storage space usage by reached the upper limit , and also can make the capacity of the encoded . The the protocol Unlike BB84 , Alice and Bob need to mutually inform each other of their measurement -based information . Relative probability entire information bits transmitted in this agreement is almost close to 100% . Ever since the People With GHZ states for the first time given quantum secret sharing protocol , quantum secret sharing has aroused extensive attention . We prove Alice in only three unitary operations to encode , and rebels with the optional two-particle entangled states as a false signal to attack can still be guaranteed under the agreement of parties that shared confidential information with the completion of the single photon is safe. We also draw a maximum average probability of success of communication traitor can be obtained after a rigorous derivation and calculation . In other words, it is obtained successfully identify the largest average probability of success of six state can be obtained .

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CLC: > Mathematical sciences and chemical > Physics > Optics > The light nature of the theory > Quantum optics
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