49六合彩

摘要

In theory, quantum cryptography can provide unconditional secure communication between two trustful parties. However, the imperfect devices may leave loopholes for various hackings in practical implementations. In this talk, I shall discuss the solutions to close these loopholes and present a couple of experiments recently achieved by our group, including: passive decoy QKD and measurement device independent QKD. Meanwhile, I will present an ultra-new type of quantum cryptography experiment, unconditional secure bit commitment, a secure communication between two mistrustful parties.