SSO (Single Sign-On)
Definition
Single Sign-On (SSO) is an authentication method that allows users to access multiple applications with one set of credentials.
SSO works through standards like SAML 2.0, OAuth 2.0, and OpenID Connect. Popular providers include Okta, Microsoft Azure AD, and Google Workspace.
Important: if an SSO account is compromised, an attacker gains access to all linked applications. Always combine SSO with MFA.