Enhancement on "quantum blind signature based on two-state vector formalism"

Authors:
Chun-Wei Yang;Tzonelih Hwang;Yi-Ping Luo
Affiliations:
Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan City, Taiwan, ROC 70101;Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan City, Taiwan, ROC 70101;Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan City, Taiwan, ROC 70101
Venue:
Quantum Information Processing
Year:
2013

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Abstract

Recently, Su et聽al. (Opt Comm 283:4408---4410, 2010) proposed a quantum blind signature based on the two-state vector formalism. Their protocol is rather practical because the signer and the blind signature requester only have to perform measurement operations to complete the quantum blind signature. This study points out that a dishonest signer in their scheme can reveal the blind signature requester's secret key and message without being detected by using Trojan horse attacks or the fake photon attack. A modified scheme is then proposed to avoid these attacks.