A Private Quantum Bit String Commitment
1
Instituto de Telecomunicações, 1049-001 Lisbon, Portugal
2
Departamento de Matemática, IST, Universidade de Lisboa, 1049-001 Lisbon, Portugal
3
LASIGE and Departamento de Informática, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal
*
Authors to whom correspondence should be addressed.
Entropy 2020, 22(3), 272; https://doi.org/10.3390/e22030272
Received: 14 January 2020 / Revised: 11 February 2020 / Accepted: 25 February 2020 / Published: 27 February 2020
(This article belongs to the Special Issue Quantum Entanglement)
We propose an entanglement-based quantum bit string commitment protocol whose composability is proven in the random oracle model. This protocol has the additional property of preserving the privacy of the committed message. Even though this property is not resilient against man-in-the-middle attacks, this threat can be circumvented by considering that the parties communicate through an authenticated channel. The protocol remains secure and private (but not composable) if we realize the random oracles as physical unclonable functions (PUFs) in the so-called bad PUF model.
Keywords:
quantum bit commitment; privacy; entanglement; composable security; physical unclonable functions
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
MDPI and ACS Style
Gama, M.; Mateus, P.; Souto, A. A Private Quantum Bit String Commitment. Entropy 2020, 22, 272.
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