Page 40 - Implementation of Secure Authentication Technologies for Digital Financial Services

6.7.7 DID Resolution
The DID specification requires each DLT to have a DID DID as input and resolve it to a DID Document. The
Method specification to describe how DID operations universal resolvers are specifically designed to work
are performed. The implication of having many DID for decentralized identifiers and support DID resolu-
Method specifications is that resolving a text string, tion over many different types of DLT and networks
the DID, to locate the trust root and the associated [15]. The universal resolver approach solves the
DID Document is complex. The DID resolution func- problem of heterogeneous networks having different
tion could become a major impediment to interoper- method specifications for their own DID. Figure 25
able DIDs. Work has begun on a universal DID resolv- depicts the Universal Resolver concept [15].
er architecture and toolset that can take any valid

Figure 25 – Universal DID Resolver

Ledger 1 Ledger 2 Ledger N Ledger N+1

Driver Driver Driver Http get
DID:ledger1 DID:ledger2 DID:ledgerN

Universal Resolver

Http get Http get

App App

38 Implementation of Secure Authentication Technologies for Digital Financial Services