Quantum Secure Communication Protocol Using Two-Mode Squeezed States

As the development of information technology, all parts of our society demand for information security, and it draws international attention. Because information security not only influences national politics security, economy security, military security and stabilization of the society, but also has effects on every person in the society.Quantum secure communication is a new research area based on classical information theory, communication theory and quantum mechanics theory. Quantum secure communication can be used in many areas of quantum information research such as quantum key distribution (QKD), quantum secure direct communication, quantum identity authentication and so on.The purposes of this paper are focused on theoretic researches of quantum secure communication using two-mode squeezed states. After the discussion of continuous variable quantum signal detector, this paper proposed two protocols based on quantum secure communication using two-mode squeezed states. Two-mode squeezed states quantum signal is a kind of continuous variable quantum signal based on entanglement. this paper make a theoretical research on Balanced homodyne detector which can detect continuous variable quantum signal , then the design of amplifying circuit and its simulation result are all provided.In the area of QKD, A quantum key distribution scheme using two-mode squeezed states is proposed in this paper. The security of the proposed scheme against beam splitter attack is analyzed using Shannon information theory. The analytical expression of the secret information rate is given in terms of squeezed factor and channel parameters. The mode-mode correlation of two-mode squeezed states guarantees the security of the proposed scheme.Quantum secure communication is not only can be used in many areas of quantum information research, it is also can be used in Classical areas. A quantum voting protocol using two-mode squeezed states is proposed in this paper. This protocol makes use of Uncertainty Principle by using Random-Select, and then possible attack modes were analyzed.