Huang, Z., Kok, P. and Lupo, C. (2021) Fault-tolerant quantum data locking. Physical Review A, 103 (5). 052611. ISSN 2469-9926
Abstract
Quantum data locking is a quantum communication primitive that allows the use of a short secret key to encrypt a much longer message. It guarantees information-theoretical security against an adversary with limited quantum memory. Here we present a quantum data locking protocol that employs pseudorandom circuits consisting of Clifford gates only, which are much easier to implement fault tolerantly than universal gates. We show that information can be encrypted into n-qubit code words using order n − Hmin (X) secret bits, where Hmin (X) is the min-entropy of the plain text, and a min-entropy smaller than n accounts for information leakage to the adversary. As an application, we discuss an efficient method for encrypting the output of a quantum computer.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 American Physical Society. This is an author-produced version of a paper subsequently published in Physical Review A. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/M013472/1 Engineering and Physical Sciences Research Council EP/T001011/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL UNSPECIFIED |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 04 Jun 2021 10:36 |
Last Modified: | 04 Jun 2021 11:27 |
Status: | Published |
Publisher: | American Physical Society |
Refereed: | Yes |
Identification Number: | 10.1103/physreva.103.052611 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:174863 |