Lightweight selective disclosure for verifiable documents on blockchain

【Author】 Saito, Kenji; Watanabe, Satoki

【Source】ICT EXPRESS

【影响因子】4.754

【Abstract】To achieve lightweight selective disclosure for protecting privacy of document holders, we propose an XML format for documents that can hide arbitrary elements using a cryptographic hash function and salts, which allows to be partially digitally signed and efficiently verified, as well as a JSON format that can be converted to such XML. The documents can be efficiently proven to exist by representing multiple such structures as a Merkle tree and storing its root in blockchain. We show that our proposal has advantages over known methods that represent the document itself as a Merkle tree and partially hide it. (C) 2021 The Korean Institute of Communications and Information Sciences (KICS). Publishing services by Elsevier B.V.

【Keywords】Selective disclosure; Content extraction signature; Privacy; Proof of existence; Blockchain

【发表时间】2021 SEP

【收录时间】2022-01-02

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