B. Clothing retailer acts as identity provider (IdP), confirms identity of user using industry standards, then sends credentials to partner businesses that act as a Service Provider and allows access to services.
The Extended Identity principle is a concept that is used to enable access to resources across partner businesses with different IAM technologies. In this scenario, the clothing retailer acts as an identity provider (IdP), which confirms the identity of the user using industry standards such as SAML, OAuth, or OpenID Connect. The IdP then sends the user's credentials to partner businesses that act as a Service Provider (SP) and allow access to resources.
By using a common IAM protocol, such as SAML, OAuth, or OpenID Connect, the partner businesses can trust the clothing retailer's authentication of the user's identity and grant access to the requested resources. This allows the clothing retailer's employees to access resources at partner businesses without having to maintain separate user accounts for each partner business.