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Nov 12, 2026 · Information Security
SSO vs OAuth 2.0: Core Differences, CAS Flow, and Four Grant Types Explained
This article compares SSO and OAuth 2.0, detailing the CAS-based SSO authentication flow, OAuth 2.0's four grant types (authorization code, implicit, password, client credentials), and clarifies how OAuth 2.0 can implement SSO while distinguishing both from security frameworks like Spring Security and Shiro.
Authorization Code GrantCASClient Credentials Grant
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