DID is a globally unique identifier and doesn’t require a centralized

registration authority, and unlike traditional identifiers that are

created for us by third parties, a DID is self-created by the user.

Any organization that wishes to build a DID framework has to abide

by all these rules for the W3C compliance.

17.4 Data sharing types

DID platforms are architected in such a way that the user has the

options of sharing the data in the following three different modes:

Traditional

Selective disclosure

Zero-knowledge-proof modes

In the traditional mode, all the data in the VC are shared as it is,

whereas in the selective disclosure mode, only the required data are

shared with the third party verifiers to promote privacy. In the zero-

knowledge-proof mode, the user shares the data only in Boolean

(i.e., true or false) not revealing the actual value; for example, “are

you an adult, is your salary more than a particular amount” etc. In all

the three different modes of data sharing, the verifier can verify the

integrity, ownership, and validity of the data using cryptologic

algorithms.

17.5 DID Use Cases

Today, Decentralized Identity is widely used with the other emerging

technologies to build many next-generation use cases across

industry verticals. A few are listed as follows:

National Identity programs can adopt decentralized identity

approach, so that it can be the basic identity for every citizen.

Other government and private issued certificates like driving

license, civic records, access to libraries, voter ids, bank

accounts etc., can refer to the national identity as the first

verified identity.