Single Sign-On (SSO) is a strong authentication process where users can sign in once and access several applications without having to re-enter credentials. This makes both user experience and security stronger by minimizing the risks associated with passwords, for example, phishing and credential stuffing attacks. SSO is generally coupled with identity providers (IdPs) such as Okta, Azure AD, or Google Workspace, facilitating centralized identity management. But if left unsecured, SSO becomes a point of failure. It can be secured by using multi-factor authentication (MFA), session timeouts, and ongoing monitoring. An efficient SSO solution increases productivity without compromising on tight security controls.