Quantum Inf Process (2017) 16:87
On “A new quantum blind signature with unlinkability”
· Shang-Lun Tsai
· Shih-Hung Kao
Received: 6 March 2016 / Accepted: 24 January 2017 / Published online: 15 February 2017
© Springer Science+Business Media New York 2017
Abstract This article points out a security loophole in Shi et al.’s quantum blind
signature scheme. By using the modiﬁcation attack, a message owner can cheat a
signature receiver with a fake message–signature pair without being detected.
Keywords Quantum blind signature · Unlinkability · Modiﬁcation attack · Quantum
cryptography · Quantum signature
Quantum signature is an imperative research topic in quantum cryptography, which
provides the identity and message authentication and nonrepudiation of quantum states
on an insecure quantum channel. Quantum blind signature (QBS), a branch of quantum
signatures, allows a signer to sign an unknown message. QBS is useful in several
applications such as quantum cash, quantum voting systems [1–3].
Institute for Information Industry, CyberTrust Technology Institute, No. 116, Fu-Yang St.,
Taipei 106, Taiwan, R.O.C.
Department of Computer Science and Information Engineering, National Cheng Kung University,
No. 1, University Rd., Tainan 70101, Taiwan, R.O.C.