Why the Future of Identity is OpenID Connect and not SAML

This blog is part of a series comparing the implementation of identity management patterns in SAML and OpenID Connect:

Future of Identity Federation is OpenID Connect

Identity management is an enabler for networked services whether web browser, mobile or smart-tv applications or the internet of things. The increase in services will create an increase in passwords without mechanism for sharing & trusting identities. eGovernment services require a higher level of identity verification than the social authentication capabilities of Twitter & Facebook connect. The future of eGovernment Identity is an interoperable authentication and authorisation capability that can support higher levels of identity verification.

The importance of interoperability amongst identity solutions is that it will enable individuals to choose between and manage multiple different interoperable credentials. Futhermore service providers will choose to accept a variety of credential and identification media types. “Identity Solutions will be Interoperable” is a guiding principle of the US National Strategy for Trusted Identities in Cyberspace (NSTIC) which is a White House initiative for both public & private sectors to improve the privacy, security, and convenience of online transactions.

SAML is insufficiently interoperable to be the future standard for identity management federation. SAML is limited in its ability to support mobile & smart-TV applications and requires the implementation of a complex Broker Service in order to support multi-service provider & multi-IdP use cases.

OpenID Connect will most likely supersede SAML for all eGovernment externalised identity management. OpenID Connect is a lightweight identity verification protocol built on top of modern web standards (OAuth 2.0, REST and JSON) superseding OpenID 2.0. OpenID Connect allows a service provider (Relying Party) to select between a variety of registered or discovered identity providers. OpenID Connect can satisfy all of the SAML use cases but with a simpler, JSON/REST based protocol.

SAML OpenID Connect Comparison
SAML 2.0 & OpenID Connect comparison

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