Blockchain in IoT and Beyond: Case Studies …

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Table 1 Common DID under research and development

Network/Protocol

Author

DID Prefix

Spec Hosted at

Bitcoin

Christopher Allen, Ryan

Grant, Kim Hamilton Duffy

did:btcr:

https://w3c-ccg.github.io/

didm-btcr/

Jude Nelson

did:stack:

https://github.com/blocks

tack/blockstack-core/blob/

stacks-1.0/docs/blockstack-

did-spec.md

Ethereum (uPort)

uPort

did:ethr:

https://github.com/decentral

ized-identity/ethr-did-res

olver/blob/master/doc/did-

method-spec.md

Quorum

Baidu, Inc

did:ccp:

https://did.baidu.com/did-

spec/

Hyperledger Fabric

SecureKey

did:trustbloc:

https://github.com/trustbloc/

trustbloc-did-method/blob/

master/docs/spec/trustbloc-

did-method.md

Halialabs Pte Ltd

did:emtrust:

https://github.com/Halial

abs/did-spec/blob/gh-pages/

readme.md

Sovrin

Mike Lodder

did:sov:

https://sovrin-foundation.git

hub.io/sovrin/spec/did-met

hod-spec-template.html

IPFS

TranSendX

did:ipid:

https://did-ipid.github.io/

ipid-did-method/

Holochain

Holo.Host

did:holo:

https://github.com/WebOfT

rustInfo/rwot9-prague/blob/

master/draft-documents/did:

hc-method.md

Hedera Hashgraph

Hedera Hashgraph,

Swisscom Blockchain AG

did:hedera:

https://github.com/hashgr

aph/did-method/blob/mas

ter/did-method-specifica

tion.md

Ledger Agnostic

DID Meme Maintainers

did:meme:

https://github.com/OR13/

didme.me#did-method-spec

Blockchain Commons

did:onion:

https://blockchaincommons.

github.io/did-method-onion/

SecureKey

did:orb:

https://trustbloc.github.io/

did-method-orb/

believed, one gathering in communication will introduce certifications to different

gatherings, and those depending on gatherings can check that the accreditations came

from a guarantor that they trust. Table 1 gives the references of all the common DIDs,

which are under research and development.