When using the NT User Authentication option with Titan/Cornerstone Servers, the S-Key/OTP feature is not available.

This is a limitation in the NT User Authentication subsystems of Windows NT/2K/XP.

An alternative to using S-Key/OTP would be to enable the Implicit/990 SSL feature of Titan/Cornerstone and use an SSL encrypted channel to connect to Titan/Cornerstone. This would ensure that both the users Username and Password are securely transmitted over the Internet.