由于此协议是在信息论通信模型下，所以协议是无条件安全的。
Since the presented protocol is based on information theoretic model, it is unconditionally secure.
量子密钥分配特别适合光通信环境，而且可以实现无条件安全性。
Quantum cryptograph has extraordinary adaptability to the optical communication and unconditional security which classical cryptography has been striving for.
该方案可以应用在分布式量子通信网络中，并证明是无条件安全的。
The scheme can be applied in the distributed quantum communication network. It is proved unconditional secure.
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