A company uses multiple SaaS-based cloud applications. All the applications require authentication upon access. An administrator has been asked to address this issue and enhance security. Which of the

SSO centralizes authentication so a user logs in once through an identity provider (such as Microsoft Entra ID or Okta) and is granted access to all federated SaaS applications without re-entering credentials. This directly addresses the repeated authentication issue and enhances security by reducing password sprawl and enabling centralized access policy enforcement.

Certificate authentication strengthens the security of a single authentication event but does not eliminate the need for separate logins to each SaaS application.

Federation is the underlying trust mechanism that enables SSO between identity providers and service providers, but SSO is the user-facing solution that addresses the stated problem.

Multifactor authentication adds a second verification factor per login but increases the number of authentication steps rather than reducing repeated prompts across applications.