Comment on "proactive quantum secret sharing"
Gan Gao
TL;DR
This paper critically analyzes a proposed proactive quantum secret sharing scheme, revealing security vulnerabilities where dishonest participants can eavesdrop without detection, and suggests potential improvements.
Contribution
It identifies security flaws in Qin and Dai's scheme and proposes a possible enhancement to improve its security during distribution.
Findings
Dishonest participants can eavesdrop without errors.
The original scheme is not secure against collusion.
A potential improvement to the distribution phase is suggested.
Abstract
In the paper [Quantum Inf. Process. 14, 4237-4244 (2015)], Qin and Dai proposed a proactive quantum secret sharing scheme. We study the security of the proposed scheme and find that it is not secure. In the distribution phase of the proposed scheme, two dishonest participants may collaborate to eavesdrop the secret of the dealer without introducing any error. Incidentally, a possible improvement of the distribution phase is given.
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Taxonomy
TopicsQuantum Information and Cryptography · Quantum Mechanics and Applications · Quantum Computing Algorithms and Architecture