SSO
Single Sign-On is an authentication method that enables users to access multiple applications with a single set of login credentials, reducing repeated logins while supporting centralized access control.
This is a convenience feature which reduces the number of times a user must log in to access their accounts, but it also serves an important security function.
For example, consider a company that uses multiple web-based tools for project management, email, and file sharing. With SSO, an employee can log in once using a single set of credentials, and they'll be authenticated across all of these tools without needing to log in separately to each one.
SSO works by creating a trust relationship between an identity provider (IdP) and a service provider (SP). Once a user's identity is verified by the IdP, they're granted access to all associated services without the need to re-authenticate. Most SSO systems use standards like OAuth, OpenID Connect, or SAML to achieve this.
