Federated authentication is a technology that simplifies the login experience by allowing users to access multiple digital environments using a single set of credentials, enhancing both security and user convenience. Unlike traditional single sign-on (SSO) systems, federated authentication extends its applicability across a wider array of apps and services, leveraging trust networks between identity providers and service providers to manage authentication and authorization. It utilizes various protocols like SAML, OAuth 2.0, and OpenID Connect to facilitate seamless identity verification across domains. The primary advantage of federated authentication is its ability to unify identities across different platforms without the need for bespoke software, although it shares the single point of failure risk inherent in SSO systems. This approach is particularly beneficial in environments with multiple services requiring unified access, such as universities, collaborative agencies, and cloud-based enterprises, ensuring efficient identity management and enhanced security. By outsourcing identity security to third-party experts, organizations can focus on their core functions while maintaining robust security practices.