Cyberspace has become the most popular carrier of information exchange in every corner of our life, which is beneficial for our life\nin almost all aspects. With the continuous development of science and technology, especially the quantum computer, cyberspace\nsecurity has become themost critical problem for the Internet in near future. In this paper, we focus on analyzing characteristics of\nthe quantumcryptography and exploring of the advantages of it in the future Internet. It isworth noting thatwe analyze the quantum\nkey distribution (QKD) protocol in the noise-free channel. Moreover, in order to simulate real situations in the future Internet,\nwe also search the QKD protocol in the noisy channel. The results reflect the unconditional security of quantum cryptography\ntheoretically, which is suitable for the Internet as ever-increasing challenges are inevitable in the future.
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