Hunting cheaters in a voting competition

Question

Currently we are running a competition which proceeds very well. Unfortunately we have all those cheaters back in business who are running scripts which automatically vote f

Answer 1

1.Use recaptcha
2. Yes randomize your voting options but not like this:
      -> from vote_id_1 to asdsasd_1, grdsgsdg_2,
      Instead use session variables to set a mask from vote_id_1 to asgjdas87th2ad in the vote form.