Which identity management standard allows users to consolidate their digital identities with third-party services?

The correct choice is the identity management standard that facilitates users in consolidating their digital identities with third-party services. This standard is designed to allow for a seamless connection between a user's identity managed by one provider and various other services or applications. It enables users to log in to multiple services using a single identity, simplifying the user experience and enhancing convenience.

As such, this standard typically provides a way for users to authenticate with third-party applications without needing to create separate accounts for each service. By using such a streamlined approach, it not only fosters better user engagement but also has security benefits, as users tend to use stronger, more unique passwords when they do not have to remember multiple credentials.

While Secure Assertion Markup Language (SAML) and Shibboleth also deal with identity management and single sign-on, they primarily focus on enterprise-level authentication between identity providers and service providers. The Lightweight Directory Access Protocol (LDAP) is more concerned with accessing and maintaining distributed directory information services, rather than directly managing user identity across third-party services.

Thus, the selected standard is distinct in its ability to simplify and unify user experiences across various platforms by allowing an aggregated digital identity solution.