Only a third believe it would be difficult or impossible to carry out a successful insider attack.

Fortune 500 breaches seem to be a theme this week.

The SWIFT banking network on Friday updated financial institutions worldwide of new security resources it has developed in the wake of massive fraud. Officials also reminded banks of their role in securing their respective infrastructures. Banks in Bangladesh, Vietnam and Ecuador have been infiltrated by attackers who stole credentials for the SWIFT system to move...