Word from Grifter is Warlock Games (Warl0ck Gam3s) is to return to DEF CON 25.
"Participants try their skills with digital forensics, physical security, and other challenges from an exploit team."
Site: http://www.gam3z-inc.com/

I am not affiliated with this contest. When the organizers post something official, ignore all of what I include here.