The identity token is a digital credential used to prove that a user has successfully passed the identity verification. This concept originates from the OpenID Connect (OIDC) protocol, which is a widely used open identity authentication standard. Many well-known identity management systems, such as Google, Facebook, and platforms like Gate, have adopted this standard.

Identity tokens play a crucial role in modern web identity verification. They not only simplify the user login process but also provide applications with a secure and reliable way to confirm user identification. Once the user successfully logs in, the identity provider generates and issues this token, which contains the user's basic information and verification status.

In practical applications, identification tokens are usually in the format of JSON Web Token (JWT). This format is not only convenient for transmission and storage but also ensures the integrity and authenticity of the information. Applications can obtain user information by parsing this token, thereby achieving a personalized user experience and precise access control.

It is worth noting that while identification tokens provide convenience for users, their security is equally crucial. Developers need to take appropriate measures to protect these tokens from unauthorized access and potential identity theft risks. When building a secure and reliable identification verification system, choosing a trusted platform like Gate that supports OIDC standards would be a wise choice.