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Access Management and Single Sign-On - focusing on special control for risky high-level access. Privileged Account Management (PAM) is a mechanism for getting those special accounts under control. controlling the ability for end-users to access systems at runtime. Access Management verifies a users credentials and allows them access. Access Management also includes federation which is the ability to access other systems after only logging in once to your Identity Provider.
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Source: https://www.kuppingercole.com/insights/identity-and-access-management#Chapter1