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conceptAuthentication Protocol
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Overview
Developed byYale University
Maintained byApereo Foundation
Founded2002
LicenseApache License 2.0
Open source✓ Open Source
Use caseSingle Sign-On authentication
Technical
Protocols
SAMLOAuth 2.0OpenID Connect
Integrates with
LDAPActive Directory
Also see
Alternative to
Shibboleth
Competes with
Okta
Knowledge graph stats
Claims14
Avg confidence90%
Avg freshness100%
Last updatedUpdated 11 days ago
WikidataQ1052962
Trust distribution
100% unverified
Governance
EU Risknot classified
Training data disclosure

CAS

concept

Central Authentication Service protocol for single sign-on web authentication

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developed by

ValueTrustConfidenceFreshnessSources
Yale University○UnverifiedHighFresh1

primary use case

ValueTrustConfidenceFreshnessSources
Single Sign-On authentication○UnverifiedHighFresh1

pricing model

ValueTrustConfidenceFreshnessSources
free○UnverifiedHighFresh1

maintained by

ValueTrustConfidenceFreshnessSources
Apereo Foundation○UnverifiedHighFresh1

open source

ValueTrustConfidenceFreshnessSources
true○UnverifiedHighFresh1

supports protocol

ValueTrustConfidenceFreshnessSources
SAML○UnverifiedHighFresh1
OAuth 2.0○UnverifiedHighFresh1
OpenID Connect○UnverifiedHighFresh1

integrates with

ValueTrustConfidenceFreshnessSources
LDAP○UnverifiedHighFresh1
Active Directory○UnverifiedModerateFresh1

license type

ValueTrustConfidenceFreshnessSources
Apache License 2.0○UnverifiedHighFresh1

alternative to

ValueTrustConfidenceFreshnessSources
Shibboleth○UnverifiedModerateFresh1

founded year

ValueTrustConfidenceFreshnessSources
2002○UnverifiedModerateFresh1

competes with

ValueTrustConfidenceFreshnessSources
Okta○UnverifiedModerateFresh1

Alternatives & Similar Tools

Shibboleth
alternative to
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Okta
competes with
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Commonly Used With

LDAPActive Directory

Related entities

Graph Insights

Top sources (14 claims traced)
pricing_modelhighsource
founded_yearhighsource
competes_withhighsource
alternative_tohighsource
integrates_withhighsource
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Claim count: 14Last updated: 5/3/2026Edit history