TY - JOUR
T1 - Fault-tolerant quantum data locking
AU - Huang, Zixin
AU - Kok, Pieter
AU - Lupo, Cosmo
N1 - Copyright ©2021 American Physical Society. Firstly published in Physical Review A, 103(5), 052611. The original publication is available at https://doi.org/10.1103/PhysRevA.103.052611. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.
PY - 2021/5/24
Y1 - 2021/5/24
N2 - 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 - H-min(X) secret bits, where H-min(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.
AB - 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 - H-min(X) secret bits, where H-min(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.
UR - http://www.scopus.com/inward/record.url?scp=85107137106&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.103.052611
DO - 10.1103/PhysRevA.103.052611
M3 - Article
SN - 2469-9926
VL - 103
SP - 052611-1- 052611-8
JO - Physical Review A: covering atomic, molecular, and optical physics and quantum information
JF - Physical Review A: covering atomic, molecular, and optical physics and quantum information
IS - 5
M1 - 052611
ER -