Improving the security of multi-party quantum key agreement with five-qubit Brown states

Secure quantum key agreement schemes should satisfy four security features, namely correctness, security, privacy, and fairness. Recently, Cai et al. (2018) used five-qubit Brown states to propose an efficient and flexible multi-party quantum key agreement scheme. We review and analyze the security...

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Bibliographic Details
Published in:Computer communications 2020-06, Vol.159, p.155-160
Main Authors: Elhadad, Ahmed, Abbas, Safia, Abulkasim, Hussein, Hamad, Safwat
Format: Article
Language:English
Subjects:
Brown states
Collusion attack
Quantum key agreement
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Summary:Secure quantum key agreement schemes should satisfy four security features, namely correctness, security, privacy, and fairness. Recently, Cai et al. (2018) used five-qubit Brown states to propose an efficient and flexible multi-party quantum key agreement scheme. We review and analyze the security of their protocol and we prove its inability to secure the private information of participants against a proposed strategy of collusion attacks. Also, we suggest a simple solution to close the loophole in Cai et al.’s protocol.
ISSN:0140-3664
1873-703X
DOI:10.1016/j.comcom.2020.05.021