2021/02/26 by Ricardo Faleiro, Manuel Goulão
Computer Science · Medicine · Physics and Astronomy · #Authorization #Computer science #Computer security #Cryptography #Medicine #Physics #Protocol (science) #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Quantum nonlocality #Theoretical computer science #quant-ph
paper · pdf · doi:10.1103/physreva.103.022430
published as Phys. Rev. A 103, 022430, 2021 · 6 pages, 1 figure, 1 table (similar to published version)
openalex publication_date 2021/02/26 · arxiv created 2021/03/02 · arxiv updated 2021/03/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In the spirit of device-independent cryptography, we present a two-party quantum authorization primitive with nonlocality as its fueling resource. Therein, users are attributed authorization levels granting them access to a private database accordingly. The authorization levels are encoded in the nonlocal resources distributed to the users and subsequently confirmed by their ability to win Clauser-Horne-Shimony-Holt games using such resources. We formalize the protocol, prove its security, and frame it in a device-independent setting employing the notion of Clauser-Horne-Shimony-Holt self-testing via simulation. Finally, we provide a proof-of-concept implementation using the Qiskit open-source framework.