On the existence of quantum signature for quantum messages
Qin Li, Wai Hong Chan, Chunhui Wu, Zhonghua Wen
TL;DR
This paper investigates the fundamental existence of quantum signature schemes for quantum messages, providing a framework for arbitrated QS and resolving contradictions in true QS schemes.
Contribution
It introduces a basic framework for analyzing arbitrated QS and addresses the contradiction between the impossibility of true QS and existing schemes.
Findings
Framework for arbitrated QS analysis
Resolution of true QS existence contradiction
Insights into quantum message authentication
Abstract
Quantum signature (QS) is used to authenticate the identity of the originator, ensure data integrity and provide non-repudiation service with unconditional security. Depending on whether a trusted third party named arbitrator is involved or not, QS is classified as arbitrated QS and true QS. This paper studies existence problem about the two kinds of QS and contributes to two points: 1) a basic framework is provided to analyze the possibility of arbitrated QS on signing quantum messages; 2) disagreement between the impossibility of true QS and an existing true QS scheme is solved.
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