Security Analysis of Measurement-device-independent Quantum Secure
Direct Communication
- URL: http://arxiv.org/abs/2006.07184v2
- Date: Fri, 26 Jun 2020 04:13:45 GMT
- Title: Security Analysis of Measurement-device-independent Quantum Secure
Direct Communication
- Authors: Peng-Hao Niu, Jia-Wei Wu, Liu-Guo Yin, Gui-Lu Long
- Abstract summary: Quantum secure direct communication (QSDC) transmits confidential message directly in a quantum channel without utilizing encryption and decryption.
Recently measurement-device-independent (MDI) QSDC protocols in which the measurement is performed by an untrusted party using imperfect measurement devices have been constructed.
- Score: 9.897305725872496
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum secure direct communication (QSDC) is an important branch of quantum
communication that transmits confidential message directly in a quantum channel
without utilizing encryption and decryption. It not only prevents eavesdropping
during transmission, but also eliminates the security loophole associated with
key storage and management. Recently measurement-device-independent (MDI) QSDC
protocols in which the measurement is performed by an untrusted party using
imperfect measurement devices have been constructed, and MDI-QSDC eliminates
the security loopholes originating from the imperfections in measurement
devices so that enable application of QSDC with current technology. In this
paper, we complete the quantitative security analysis of the MDI-QSDC. The
security capacity is derived, and its lower bound is given. It is found that
the MDI-QSDC secrecy capacity is only slightly lower than that of QSDC
utilizing perfect measurement devices. Therefore QSDC is possible with current
measurement devices by sacrificing a small amount in the capacity.
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