# Why Identity SSO? **Teranode Identity SSO** is an authorization server and a single sign-on service. It enables the use of Web 3.0 Identity with Web 2.0 technology stacks. The underlying tehcnology is the Identity Verifier service but SSO adds advanced authorization rules and single sign-on capabilities on top of the standard verification of Verifiable Credentials. Using SSO, client services can allow end-users to present their Web 3.0 credentials as a means of authentication in a manner compliant with OAuth v2 and OIDC standards. Additionally, it offers advanced configuration options for controlling what type of data clients can access. Identity SSO integrates like other Identity Providers that support OAuth v2 and OIDC standards. However, the identity information is provided by end-users themselves through Verifiable Credentials, not by the SSO service. Standards support is implemented to simplify integrations with existing systems and user agents. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.teranode.group/tng-identity-documentation/tng-identity-sso/why-identity-sso.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.