TightVNC for Windows: Installing from MSI Packages
tightvnc.com › doc › winTo protect your TightVNC Server, you can set passwords for control interface and VNC client authentication. Settings responsible for enabling authentication are USECONTROLAUTHENTICATION and USEVNCAUTHENTICATION. If USECONTROLAUTHENTICATION option is set to 1, the server will require the authentication for most of control operations.