Kqr-gaya section is quite mischievous as the train passes through ghats. Security personnel in trains is very rare and you will hardly find any of them. If you find they will be busy in collecting there share on the coal being transported illegally. It's bitter truth but that's the reality.
As far as Bengal is concerned security at asn is awesome. Hwh no doubt is major stn
The whole section of dhn-gmo-kqr- gaya route is horrible in terms of providing security to passengers