Deterministic secure quantum communication using Greenberger-Horne-Zeilinger GHZ4 state

摘要

We propose a deterministic secure quantum communication scheme by using Greenberger-Horne-Zeilinger GHZ4 states. The scheme consists of sharing the correlation of four particle GHZ4 states between the legitimate users. After ensuring the security of the quantum channel, they begin to exchange the secret information according to their four-particle projective measurements and classical information. The security of the present scheme against many attacks is also discussed.