See Security Support Provider Interface.

Security Support Provider Interface. A common interface between transport-level applications, such as Microsoft Remote Procedure Call (RPC), and security support providers (SSPs), such as Windows Distributed Security. SSPI allows a transport application to call one of the SSPs to obtain an authenticated connection. These calls do not require extensive knowledge of the security protocol's details. See also: security protocol; security support provider

Security Support Provider Interface. The API set that applications use to access SSPs such as Kerberos or NTLM.

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