Please follow the steps below to change your Security Key. Before change your security key you must reset it. If you did not reset your security key yet, please click here.

1. Log into the www.NTTgame.com portal.
2. Click on "My Account > Overview" at the top right of the web page.
3. Select "Game Services" from the left side and chose ''Knight Online'' from the right side
4. Please follow ''Security Key'' section
5. Click on on/off icon and enter your account information
6. You will be sent a link to your registered email address. Once you receive and open the email, there will be a link to follow that allows you to change your security key.