11 January 2005 Attack on Kak-quantum key distribution protocol
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Kak's Quantum Key Distribution (QKD) protocol provides not only the distribution but also the integrity of secret key simultaneously in quantum channel; consequently the additional exchange of information, used to check whether an eavesdropper exists, is unnecessary. In this comment, we will point out the failure of Kak's protocol and show that Kak's protocol is no longer provided with the joint distribution and integration that the author declares in [1].
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Ching-Nung Yang, Ching-Nung Yang, Su-Hsuan Chu, Su-Hsuan Chu, Bing-Ling Lu, Bing-Ling Lu, "Attack on Kak-quantum key distribution protocol", Proc. SPIE 5631, Quantum Optics and Applications in Computing and Communications II, (11 January 2005); doi: 10.1117/12.574190; https://doi.org/10.1117/12.574190

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