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Security Support Provider Interface
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<p>Security Support Provider Interface (SSPI) is a component of <a href="/facts/Windows_API/RRw4RtTu">Windows API</a> that performs security-related operations such as <a href="/facts/Authentication/64y4S69b">authentication</a>. </p><p>SSPI functions as a common interface to several Security Support Providers (SSPs): A Security Support Provider is a <a href="/facts/Dynamic-link_library/vySyC1dz">dynamic-link library</a> (DLL) that makes one or more security packages available to apps. </p>