A Quantum Weak Blind Signature Based on GHZ States Using Quantum Controlled Teleportation

Lou Xiaoping1, Chen Xiaoxiao1

  • 1Hunan University of Arts and Science

Details

14:30 - 14:45 | Wed 26 Jul | Grand Ballroom #1 | WeO1O1.2

Session: Special Sessions: Quantum Information Processing

Abstract

Motivated by the controlled teleportation of quantum GHZ state, a weak blind signature scheme is developed by the quantum controlled not gates. Participants jointly complete the protocol, including the sender Alice, the signatory Bob and the trusted entity Charlie. It consists of the following steps: initializing phase, blinding phase, signing phase and verifying phase. In the tripartite quantum processing, Alice blinds the message via quantum onetime-pad encryption algorithms using the key shared by Bob. Charlie signs the blinded message performed on GHZ state while Bob verifies the signature's authenticity and regains the original message with decryption algorithms. Discussion shows that the proposed scheme achieves the aim of blinding safety against signer and traceability information sender with the help of the powerful arbitrator who plays a decisive role in the adjudication of disputed. In addition, the signature can neither be forged nor disavowed by the malicious attackers. It has a wide application of online voting and electronic payment system.