Single sign-on (SSO)

Single Sign-On (SSO) is an authentication process that allows users to access multiple applications or systems with one set of login credentials. Instead of remembering different usernames and passwords for various services, users authenticate once, and the system provides secure access across connected platforms.
SSO improves user convenience, reduces password fatigue, and enhances security by centralizing authentication. It is widely used in enterprise IT, cloud services, and consumer applications where multiple systems must work together seamlessly.
Advanced
SSO works through centralized identity management systems that authenticate users and issue security tokens or credentials. Common standards include SAML (Security Assertion Markup Language), OAuth, and OpenID Connect, which transmit identity information between identity providers (IdPs) and service providers (SPs).Advanced SSO
solutions integrate with multi-factor authentication (MFA), conditional access policies, and zero-trust security frameworks. In hybrid or multi-cloud environments, SSO ensures consistent access management across on-premises applications, SaaS platforms, and mobile apps. Centralized logging and monitoring also strengthen compliance and security auditing.
Relevance
Applications
Metrics
Issues
Example
A global enterprise implemented SSO for its employees across HR, finance, and collaboration platforms. This reduced login times, cut IT support costs for password resets by 60%, and strengthened access control through centralized identity policies and MFA integration.