Table 6.

Different architectural aspects in the reviewed research works (RQ2)

Author	Entities	Initial KYC source	Trust anchor	Relying third party used	API used
Rajyashree et al. [11]	Customer, Bank	Customer	Not specified	No	No
Sinha et al. [37]	Customer	Customer	ID Card	Not specified	No
Ullah et al. [41]	Customer, FI, Regulator	Customer	Not specified	Yes (Regulator, role not explained)	Yes
Parra-Moyano et al. [7]	Customer, FI, Regulator	Customer	Not specified	Yes (Regulator, to manage the system)	No
Thoroddsen et al. [8]	Customer, FI, Regulator	Customer	Not specified	Yes (Regulator, to manage the system)	No
George et al. [44]	Customer, FI	Aadhaar Database	Aadhar Database	Regulator / Government Agency	No
Schlatt et al. [46]	Customer (Holder), Verifier (FI), Issuer (FI, Government Agency)	Customer	Not clearly specified	No	No
Tina et al. [49]	Customer, FI, Regulator	Customer	Not specified	Yes (Regulator, to maintain the system)	No