Titlebook: Quantum Cryptography; From Key Distributio Federico Grasselli Book 2021 The Editor(s) (if applicable) and The Author(s), under exclusive li

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Quantum Conference Key Agreement,ibe the functioning of a general CKA protocol and define its security, which is proven in Sect. . of the Appendix. We conclude the Chapter by discussing the first experimental implementations of CKA (Sect. .).

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Beyond Point-to-Point Quantum Key Distribution,ngs and asymmetric channels (Sect. .). Finally, in Sect. . we generalize the founding idea of TF-QKD to a multiparty scenario by describing a quantum conference key agreement (CKA) based on single-photon interference events.

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Device-Independent Quantum Cryptography,cols. We conclude by discussing the suitability of full-correlator Bell inequalities for DICKA and present a multipartite Bell inequality specifically built for the task of DICKA (Sect. .). In the Appendix of this Chapter (Sects. . and .) we provide additional details on the security proof of the CHSH-based DIQKD protocol.

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Quantum Science and Technologyhttp://image.papertrans.cn/q/image/781129.jpg

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https://doi.org/10.1007/978-3-030-64360-7Quantum key distribution; Quantum conference key agreement; Quantum cryptography; Information-theoretic

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Quantum Cryptography978-3-030-64360-7Series ISSN 2364-9054 Series E-ISSN 2364-9062

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Introduction,Quantum cryptography exploits distinctive quantum properties of nature in order to perform a given cryptographic task. Most quantum cryptographic protocols are —at least in principle— information-theoretically secure, which is a very strong notion of security as it is deduced purely from information theory.