https://doi.org/10.1140/epjd/e2009-00306-3
Participant attack on a kind of MQSS schemes based on entanglement swapping
1
School of Science, Beijing University of Posts and
Telecommunications, 100876 Beijing, P.R. China
2
State Key Laboratory of Networking and Switching Technology, Beijing
University of Posts and Telecommunications, 100876 Beijing, P.R. China
3
National Laboratory for Modern Communications, P.O. Box 810,
610041 Chengdu, P.R. China
Corresponding author: gfenzhuo@bupt.edu.cn
Received:
18
June
2009
Published online:
8
December
2009
A kind of multiparty quantum secret sharing (MQSS) schemes based on entanglement swapping is analyzed and an effective attack is proposed. Some unauthorized agent groups can recover the secret from the dealer with the help of this special attack. It is shown that entanglement swapping not only makes the MQSS protocols feasible but also brings a fatal drawback to them. Furthermore, a possible improvement on such protocols is proposed, which makes them secure against the proposed attack.
PACS: 03.67.Dd – Quantum cryptography and communication security / 03.67.-a – Quantum information / 03.67.Ac – Quantum algorithms, protocols, and simulations
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009