Worried about outsiders breaking into your network? Don't overlook your own employees. Just ask Autotote, where a software developer almost stole a $3 million jackpot. Serious handicappers betting on ponies know they're always bucking the odds.But the rigging of the Pick Six payoff at the Breeder's Cup championship showed how trusted insiders can manipulate networks to steal from unsuspecting bettors—long before the horses get to the gate. The million-dollar fiasco is not an isolated problem. The truth is, any company that handles financial transactions or valuable information electronically runs the risk of being fleeced by its own technology staff—or users....