An improved arbitrated quantum signature protocol based on the key-controlled chained CNOT encryption

• Published in: Quantum information processing Vol. 16; no. 3; pp. 1 - 15
• Main Authors: Zhang, Long, Sun, Hong-Wei, Zhang, Ke-Jia, Jia, Heng-Yue
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-03-2017; Springer Nature B.V
• Subjects: Arbitration; Chains; Data Structures and Information Theory; Encryption; Mathematical Physics; Physics; Physics and Astronomy; Protocol; Quantum Computing; Quantum encryption; Quantum Information Technology; Quantum Physics; Spintronics; Arbitrated quantum signature; Chained CNOT operations; Forgery attacks; Disavowal attacks
• ISSN: 1570-0755; 1573-1332
• DOI: 10.1007/s11128-017-1531-0

In this paper, a new quantum encryption based on the key-controlled chained CNOT operations, which is named KCCC encryption, is proposed. With the KCCC encryption, an improved arbitrated quantum signature (AQS) protocol is presented. Compared with the existing protocols, our protocol can effectively prevent forgery attacks and disavowal attacks. Moreover, only single state is required in the protocol. We hope it is helpful to further research in the design of AQS protocols in future.