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Blockchain, as one of the most promising technology, has attracted tremendous attention. The interesting characteristics of blockchain are decentralized ledger and strong security, while non-repudiation is the important property of information security in blockchain. A digital signature scheme is an effective approach to achieve nonrepudiation. In this paper, the characteristics of blockchain and the digital signature to guarantee information nonrepudiation are firstly discussed. Secondly, thedoi:10.1186/s13638-020-01665-w fatcat:wnp4uxzixzfzngxnerlkbewame