Which authentication protocol is most commonly used by government agencies worldwide for secure single sign-on (SSO) in citizen-facing digital identity systems?

In today's digital governance landscape, governments worldwide are implementing sophisticated systems to protect citizen data while providing seamless access to services. The cybersecurity measures behind government digital identity programs represent some of the most advanced security architectures in the public sector. Test your knowledge of how governments are balancing security and accessibility in their digital identity initiatives.

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OAuth 2.0
SAML 2.0
OpenID Connect
WS-Federation