Which Apple technology can an identity provider (IdP) use to implement modern authentication protocols?

Single sign-on (SSO) extensions are a key technology that enables an identity provider (IdP) to implement modern authentication protocols. SSO allows users to authenticate once and gain access to multiple services without needing to log in repeatedly. This streamlines the user experience and enhances security by reducing the number of credentials a user must manage.

SSO integrations are particularly important in enterprise scenarios, where users often access a range of applications and services. SSO extensions can work with various identity providers to support standards like SAML, OAuth, and OpenID Connect, facilitating secure token-based authentication and making it easier to manage user identities across different platforms.

In contrast, CloudKit serves as a framework for storage, and access to app data rather than directly related to authentication protocols. iCloud Drive is primarily a cloud storage solution for file management, and while it may utilize Apple ID for user authentication, it is not fundamentally an identity management service. Apple ID itself is a user account service providing access to Apple services, but it does not specifically implement modern authentication protocols in an enterprise context as SSO extensions do.