Hello,
We have noticed an influx of NGS issues and random disconnects being reported - Do not be alarmed, we are looking into this and will hopefully have an update/fix for everyone.
Some players have been reporting an occasional kick and others have been reporting several kicks throughout the day. If this is happening to you do not worry, you won’t be banned from the game for this (unless you are actually cheating).
I (or someone) will update this thread as soon as we have more information.
As always thank you for your patience. 
~Noxie
http://forums.dirtybomb.nexon.net/discussion/16585/security-violation-error-message/p1
While we are working on this I would suggest contacting customer support with a DxDiag.