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OpenID Connect is an authentication layer built on top of OAuth 2.0. It adds an ID token (a signed JWT) that contains user identity claims like name and email. OIDC lets applications verify a user's identity while also obtaining authorization tokens. It is the standard for modern web and mobile SSO.
OIDC has largely replaced SAML in new application deployments. Security engineers configure OIDC providers and validate JWT signatures. Penetration testers look for JWT manipulation and nonce-reuse vulnerabilities. Understanding OIDC is expected in any cybersecurity role that touches web application security.
Looking for the acronym? Read about OIDC in the cybersecurity acronym decoder
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Other glossary terms whose definition cites this one.
"…izations without separate credentials. Protocols like SAML, OIDC, and WS-Federation enable federated identity. Federation re…"
"…ely in APIs. Understanding the difference between OAuth and OpenID Connect is a common interview topic."
"…n-fixation flaws. Understanding SSO protocols like SAML and OIDC is a practical requirement for most cybersecurity roles."
OpenID Connect is an authentication layer built on top of OAuth 2.0. It adds an ID token (a signed JWT) that contains user identity claims like name and email. OIDC lets applications verify a user's identity while also obtaining authorization tokens. It is the standard for modern web and mobile SSO.
OIDC has largely replaced SAML in new application deployments. Security engineers configure OIDC providers and validate JWT signatures. Penetration testers look for JWT manipulation and nonce-reuse vulnerabilities. Understanding OIDC is expected in any cybersecurity role that touches web application security.
Cybersecurity professionals who work with OpenID Connect include Security Engineer, Penetration Tester, Security Architect. These roles apply OpenID Connect knowledge within the Identity & Access domain.
Definitions are original explanations written for career development purposes. For authoritative technical definitions, refer to NIST, ISO, or the relevant standards body.
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