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.