Did is so important tp web 3.0 or internet 2.0
- https://w3c.github.io/did-core/
- https://bitsonblocks.net/2017/05/17/gentle-introduction-self-sovereign-identity/
- elastos: https://github.com/stiartsly/Elastos.DID.Swift.SDK
- https://techcommunity.microsoft.com/t5/azure-active-directory-identity/toward-scalable-decentralized-identifier-systems/ba-p/560168
- https://bitcoinmagazine.com/articles/microsofts-ion-is-an-open-source-bet-on-bitcoin
- https://zh-tw.coursera.org/lecture/blockchain-crypto-decentralized-finance/introduction-to-identity-and-identifiers-W4J6O