Abstract
Device-independent quantum key distribution (DIQKD) provides the strongest form of secure key exchange, using only the input-output statistics of the devices to achieve information-theoretic security. Although the basic security principles of DIQKD are now well understood, it remains a technical challenge to derive reliable and robust security bounds for advanced DIQKD protocols that go beyond the previous results based on violations of the CHSH inequality. In this work, we present a framework based on semidefinite programming that gives reliable lower bounds on the asymptotic secret key rate of any QKD protocol using untrusted devices. In particular, our method can in principle be utilized to find achievable secret key rates for any DIQKD protocol, based on the full input-output probability distribution or any choice of Bell inequality. Our method also extends to other DI cryptographic tasks. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000514577Publication status
publishedExternal links
Journal / series
npj Quantum InformationVolume
Pages / Article No.
Publisher
NatureOrganisational unit
03781 - Renner, Renato / Renner, Renato
Related publications and datasets
Is new version of: http://hdl.handle.net/20.500.11850/391641
More
Show all metadata