Industrial cyber security is a passion of mine. In some ways like the PI System, industrial cyber security is a fairly close knit community with a few annual gatherings.
If you are curious about cyber security conferences and have 7.5 minutes - check out my Mini-Keynote b-side address at Digital Bond S4x13.
http://www.digitalbond.com/blog/2013/02/19/s4x13-video-bryan-owen-mini-keynote/
-Bryan
ps. Standby for the S4 presentation on Fuzzing by DejaVu Security and OSIsoft to be posted in the near future.