Mainframe systems process a vast amount of vital transactions daily—that includes everything from the swipe of a credit card at the grocery store to purchasing an airline ticket online or accessing sensitive healthcare information. A Rocket Software survey found that over half (51%) of IT leaders rely on mainframe systems to handle all, or nearly all, core business applications. Despite the importance of the mainframe, it has been neglected over the years with organizations focusing on perimeter security. According to Gartner, IT security software is the top purchase category (28%) for those b…