TY - JOUR
T1 - Multi-user private comparison protocol using GHZ class states
AU - Chang, Yao Jen
AU - Tsai, Chia Wei
AU - Hwang, Tzonelih
N1 - Funding Information:
Acknowledgments The authors would like to thank the National Science Council of the Republic of China and the Research Center of Quantum Communication and Security, National Cheng Kung University, Taiwan, R.O.C. for financially supporting this research under Contract Nos. NSC 100-2221-E-006-152-MY3 and D100-36002, respectively.
PY - 2013/2
Y1 - 2013/2
N2 - This paper proposes a pioneering quantum private comparison (QPC) protocol for n users. State-of-the-art QPC protocols have been designed for two users who wish to compare their private information. However, if n users want to perform the equality comparison, these two-user QPC protocols have to be executed repeatedly at least n - 1 times. The proposed protocol allows n users' private information to be compared within one protocol execution. The proposed QPC protocol takes the Greenberger-Horne-Zeilinger (GHZ) class as a quantum resource and uses a special property in the GHZ-class state to perform the equality comparison. Moreover, due to the one-step quantum transmission, the protocol is free from Trojan horse attacks and it is also shown to be secure against other well-known attacks.
AB - This paper proposes a pioneering quantum private comparison (QPC) protocol for n users. State-of-the-art QPC protocols have been designed for two users who wish to compare their private information. However, if n users want to perform the equality comparison, these two-user QPC protocols have to be executed repeatedly at least n - 1 times. The proposed protocol allows n users' private information to be compared within one protocol execution. The proposed QPC protocol takes the Greenberger-Horne-Zeilinger (GHZ) class as a quantum resource and uses a special property in the GHZ-class state to perform the equality comparison. Moreover, due to the one-step quantum transmission, the protocol is free from Trojan horse attacks and it is also shown to be secure against other well-known attacks.
UR - http://www.scopus.com/inward/record.url?scp=84878610041&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84878610041&partnerID=8YFLogxK
U2 - 10.1007/s11128-012-0454-z
DO - 10.1007/s11128-012-0454-z
M3 - Article
AN - SCOPUS:84878610041
VL - 12
SP - 1077
EP - 1088
JO - Quantum Information Processing
JF - Quantum Information Processing
SN - 1570-0755
IS - 2
ER -