The postprocessing of quantum digital signatures
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Many novel quantum digital signature proposals have been proposed, which can effectively guarantee the information-theoretic security of the signature for a singe bit against forging and denying. Using the current basic building blocks of signing a single bit, we give a new proposal to construct an entire protocol for signing a long message. Compared with the previous work, it can improve at least 33.33% efficiency.
KeywordsQuantum digital signature Integrity Forgery attack Authentication
We are grateful to the anonymous referees for helpful comment and detailed suggestion on revisions. This work was supported by the National High Technology Research and Development Program (863 Program) (Grant No. 2015AA011704), the Key Program of NSFC Union Foundation (Grant Nos. U1135002, U1405255), the National Natural Science Foundation of China (Grant Nos. 61202317, 61572246, 61602232, 61472048), the Plan for Scientific Innovation Talents of Henan Province (Grant No. 164100510003), the Program for Science and Technology Innovation Talents in Universities of Henan Province (Grant No. 13HASTIT042) and the Key Scientific Research Project in Universities of Henan Province (Grant Nos. 16A520021, 16A120007).