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OpenID Connect (OIDC)

Authentication

Single Sign‑On (SSO) Identity Provider (IdP) OAuth 2.0 JSON Web Token (JWT)

A login layer on top of OAuth 2.0 used for “Sign in with Google/Apple/etc.”

Definition

OpenID Connect is a standard used for logging in with an identity provider (like “Sign in with Google”). It builds on OAuth 2.0.

In plain English A login layer on top of OAuth 2.0 used for “Sign in with Google/Apple/etc.”

Why this matters

Why it matters: It can reduce password reuse and make login safer when implemented correctly.

Example

Example: A website uses OIDC to let you sign in with your Apple ID.