Open AccessOne-sided device-independent quantum key distribution for two independent parties
Author(s) -
Jun Xin,
Xiao-Ming Lu,
Xingmin Li,
Guolong Li
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.387785
Subject(s) - quantum key distribution , alice and bob , quantum cryptography , computer science , key (lock) , cryptography , key distribution , alice (programming language) , protocol (science) , shared secret , relay , quantum , computer network , computer security , public key cryptography , quantum information , physics , encryption , quantum mechanics , medicine , power (physics) , alternative medicine , pathology , programming language
Remote distribution of secret keys is a challenging task in quantum cryptography. A significant step in this direction is the measurement-device independence quantum key distribution (MDI-QKD). For two remote (or independent) parties Alice and Bob who initially no share secret information, the MDI-QKD enables them to share a secret key by the measurement of an untrusted relay. Unfortunately, the MDI-QKD yields the assumption that the devices of both Alice and Bob have to be trusted. Here, we show that QKD between two independent parties can also be realized even if the device of either Alice or Bob is untrusted. We tackle the problem by resorting to the recently developed one-sided device-independent QKD protocol. We derive conditions on the extracted secret key to be unconditionally secure against arbitary attacks in the limit of asymptotic keys. In the presence of Gaussian states and measurements, we theoretically demonstrate our scheme is feasible, which could be an attractive candidate for long distance secret communication.