Client certificate PIN required for use. Since: 2.34
Client Certificate Authentication (see RFC 2246).
The default authentication scheme of WebKit.
HTML Form authentication.
Basic authentication scheme as defined in RFC 2617.
Digest authentication scheme as defined in RFC 2617.
Negotiate (or SPNEGO) authentication scheme as defined in RFC 4559.
NTLM Microsoft proprietary authentication scheme.
Server Trust Authentication.
Authentication scheme unknown.
Enum values representing the authentication scheme.