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Quantum Information Processing
Published in: Quantum Information Processing 8/2023

01-08-2023

Enhanced quantum private comparison

Author: Yan-Feng Lang

Published in: Quantum Information Processing | Issue 8/2023

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Abstract

Quantum private comparison (QPC) is judging whether two secrets are equal or not without any information leakage. This paper suggests that the privacy is reflected in the three pieces of information—value, data length, and bits equality. However, existent QPC protocols generally just keep the first item, i.e. value secret, whereas the other two is revealed. This work insists that it should be forbidden for a true QPC protocol. For this purpose, the paper firstly proposes a novel concept of enhanced quantum private comparison (EQPC), which protects not only secrets’ specific value, but also their data length and bits equality, and then presents a novel protocol implementing EQPC. The proposed EQPC protocol was fully analysed correct and secure. Also, it is extremely easy to implement for its only usage of one type of Bell states. It can be said that the EQPC protocol is a significant step forward for the QPC development.
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Metadata
Title
Enhanced quantum private comparison
Author
Yan-Feng Lang
Publication date
01-08-2023
Publisher
Springer US
Published in
Quantum Information Processing / Issue 8/2023
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-023-04069-z

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