> For the complete documentation index, see [llms.txt](https://www.pinvoke.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.pinvoke.dev/authentication.md).

# AUTHENTICATION

- [LSA\_STRING](https://www.pinvoke.dev/authentication/lsa_string.md)
- [LSA\_UNICODE\_STRING](https://www.pinvoke.dev/authentication/lsa_unicode_string.md)
- [SECURITY\_LOGON\_SESSION\_DATA](https://www.pinvoke.dev/authentication/security_logon_session_data.md)
- [SECPKG\_CRED](https://www.pinvoke.dev/authentication/secpkg_cred.md)
- [SEC\_GET\_KEY\_FN](https://www.pinvoke.dev/authentication/sec_get_key_fn.md)
- [ISC\_REQ\_FLAGS](https://www.pinvoke.dev/authentication/isc_req_flags.md)
- [SecBufferDesc](https://www.pinvoke.dev/authentication/secbufferdesc.md)
- [SecBuffer](https://www.pinvoke.dev/authentication/secbuffer.md)
- [LSA\_HANDLE](https://www.pinvoke.dev/authentication/lsa_handle.md)
- [POLICY\_DOMAIN\_INFORMATION\_CLASS](https://www.pinvoke.dev/authentication/policy_domain_information_class.md)