The Physically Observable Security of Signature Schemes

Zecheng Wang, Zhibin Li

Siavash Khodambashi, Ali Zakerolhosseini

Recently, the laws of quantum physics have amazed classical cryptography and aided researchers to provide secure communications in presence of adversaries. In this paper we present a novel weak blind signature scheme whose security is guaranteed by fundamental principles of quantum physics. Despite previous schemes which are taking advantage of quantum entangled states, our proposed quantum blind signature relies only on Quantum Key Distribution (QKD) protocol. We show throughout this paper that our proposed quantum weak blind signature achieves a good position in security and reliability. In addition, it is feasible for the proposed scheme to become commercialized with current technology. Hence, it can be widely used for e-payment, e-government, e-business and etc.

Haoyang Yu, Yunxiao Qian

Digital signatures are widely used in electronic communications, for example in electronic commerce and e-mail. But classical digital signature scheme only offer security relying on computational assumptions. In contrast, quantum digital signatures provide security based on fundamental principles of quantum physics. Quantum group signatures provide anonymity for signatory, quantum blind signatures provide confidentiality for signed messages. In this paper we demonstrate a quantum group blind signature scheme which have the properties both of group signatures and blind signatures. Besides, the security of our scheme is guaranteed by the quantum mechanics, so without any computational assumption. the group property and blind property of our scheme profits from the properties of the measurement-based quantum computation (MBQC). Our quantum group blind signature scheme can be widely used in e-voting system, e-cash, e-commerce, etc.

Ryan Amiri

Yongzhi Chen, Yun Liu, Xiaojun Wen

Proxy blind signature was applied to the electronic paying system,electronic voting system, mobile agent system,security of internet,et al.A quantum proxy weak blind signature scheme is presented based on the correlation of Einstein-Padolsky-Rosen(EPR)pairs and controlled teleportation.Comparing the traditional proxy blind signature schemes based on computing complexity,the scheme uses the physical characteristics of quantum mechanics to implement message blinding,signature and verification,so it could guarantee not only the unconditionally security of the scheme but also anonymity of the message owner.

Zecheng Wang