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Use of blockchain for enabling Construction 4.0
Published in Anil Sawhney, Mike Riley, Javier Irizarry, Construction 4.0, 2020
Decentralized Identifiers (DIDs) are a type of identifier for verifiable, ‘self-sovereign’ digital identity on a blockchain. DIDs are fully under the control of the DID owner, independent from any centralized registry, identity provider, or certificate authority. DIDs are URLs that relate a DID owner to means for trustable interactions with that owner. DIDs resolve to DID Documents, which are simple documents with instructions for the specific DID. Each DID Document may contain at least three things: proof purposes, verification methods, and service endpoints. For example, a DID Document can specify that a particular verification method, such as a cryptographic public key or pseudonymous biometric protocol, can be used to verify a proof that was created for the purpose of authentication. Service endpoints enable trusted interactions with the DID controller (W3C, 2019a; Windley, 2019).
A Blockchain Based Decentralized Identifiers for Entity Authentication in Electronic Health Records
Published in Cogent Engineering, 2022
Manoj T, Krishnamoorthi Makkithaya, Narendra V G
Decentralized Identifiers (DIDs) are a new kind of globally unique, portable and cryptographically verifiable identifier that does not rely on any centralized authority and can never be taken away (Hughes et al., 2019). The DIDs are characterized by four core properties: permanent/persistent, resolvable, decentralized, and verifiable cryptographically. The DIDs can be assigned to any entity such as human, organization or thing. Currently, efforts are done by W3C DID working group for standardizing the DIDs. The format of DID is somewhat similar to the Uniform Resource Name (URN) so that it can be adapted to work with multiple blockchain. The DID is composed of three components, namely Schema, DID method and DID method specification, as shown in Figure 1.