| Code | Field | Name | Description |
|---|---|---|---|
| Negotiate | SecurityPackages | C:\Windows\system32\lsasrv.dll | Negotiate between Kerberos and NTLM. |
| NegoExtender | SecurityPackages | C:\Windows\system32\negoexts.DLL | Extension to negotiate with additional SSPs. |
| Kerberos | SecurityPackages | C:\Windows\system32\kerberos.DLL | Kerberos v5 implementation. |
| NTLM | SecurityPackages | C:\Windows\system32\msv1_0.DLL | NTLM implementation. |
| TSSSP | SecurityPackages | C:\Windows\system32\tspkg.DLL | Implements CredSSP (SSO for TerminalServices & RDP). |
| pku2u | SecurityPackages | C:\Windows\system32\pku2u.DLL | Implements P2P authentication (e.g. homegroups). |
| CloudAP | SecurityPackages | C:\Windows\system32\cloudAP.DLL | Implements Azure cloud authentication. |
| WDigest | SecurityPackages | C:\Windows\system32\wdigest.DLL | Implements digest authentication (HTTP, LDAP, ...). |
| Schannel | SecurityPackages | C:\Windows\system32\schannel.DLL | Implements TLS (including SSL & PCT which are considered obsolete). |
| Microsoft Unified Security Protocol Provider | SecurityPackages | C:\Windows\system32\schannel.DLL |