Secret sharing with a single d-level quantum system
Number of Authors: 4
2015 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 92, no 3, 030302Article in journal (Refereed) Published
We give an example of a wide class of problems for which quantum-information protocols based on multisystem entanglement can be mapped into much simpler ones involving one system. Secret sharing is a cryptographic primitive which plays a central role in various secure multiparty computation tasks and management of keys in cryptography. In secret sharing protocols, a classical message is divided into shares given to recipient parties in such a way that some number of parties need to collaborate in order to reconstruct the message. Quantum protocols for the task commonly rely on multipartite GHZ entanglement. We present a multiparty secret sharing protocol which requires only sequential communication of a single quantum d-level system (for any prime d). It has huge advantages in scalability and can be realized with state-of-the-art technology.
Place, publisher, year, edition, pages
2015. Vol. 92, no 3, 030302
IdentifiersURN: urn:nbn:se:su:diva-122122DOI: 10.1103/PhysRevA.92.030302ISI: 000361654200002OAI: oai:DiVA.org:su-122122DiVA: diva2:865555