A company wants to implement an access management solution that allows employees to use the same usernames and passwords for multiple applications without having to keep multiple credentials…

Multifactor authentication (MFA) adds additional verification factors to the login process but does not reduce the number of credential sets a user must maintain across applications.

Single Sign-On (SSO) allows users to authenticate once and gain access to multiple applications using the same credentials, eliminating the need to maintain or synchronize separate usernames and passwords for each application.

Biometrics is an authentication method that replaces or supplements passwords with physical characteristics, but it does not inherently provide a mechanism for using a single identity across multiple applications.

Public Key Infrastructure (PKI) provides certificate-based authentication and encryption but is an underlying cryptographic framework, not a solution specifically designed to unify credentials or enable single sign-on across applications.

Federation extends the SSO concept across organizational or domain boundaries, allowing identity providers (IdPs) to assert a user's identity to external service providers (SPs) via protocols like SAML or OIDC, enabling the same credentials to work across different organizations or cloud platforms without credential duplication.