How does digital identity authentication support single sign-on?

Digital identity authentication supports Single Sign-On (SSO) by enabling users to authenticate once and gain access to multiple systems or applications without needing to log in again for each one. This is achieved through centralized identity management, where a trusted identity provider (IdP) verifies the user's credentials and issues a token or session that other services (service providers, or SPs) trust.

How It Works:

1. Centralized Authentication: The user logs in to the IdP (e.g., via username/password, biometrics, or multi-factor authentication).
2. Token Issuance: Upon successful authentication, the IdP generates a secure token (e.g., SAML, OAuth, or OpenID Connect) that contains the user's identity information.
3. Access to Multiple Services: When the user accesses an SP, the SP checks with the IdP (via the token) to confirm the user's identity. If valid, the user is granted access without re-entering credentials.

Example:

A company uses an SSO solution where employees log in once to access email, internal tools, and cloud services. The IdP (e.g., a corporate identity system) authenticates the user, then issues a token. When the employee clicks on a service like a project management tool, the tool verifies the token with the IdP and grants access automatically.

In cloud environments, solutions like Tencent Cloud CAM (Cloud Access Management) can integrate with SSO protocols to manage user identities and permissions across multiple services efficiently. This ensures secure and seamless access while reducing password fatigue and improving security.