Anthem Healthcare had to notify clients that the personal records of as many as 80 million individuals were compromised. “Anthem was the target of a very sophisticated external cyber attack,” Anthem CEO Joseph R. Swedish said in a statement. This would seem to indicate outsiders broke through Anthems security structures and stole their database. In either case, firewalls and other security measures to keep intruders out would have no effect. The intruders were already inside the walls.”]
Source: https://www.darkreading.com/attacks-breaches/how-we-can-prevent-another-anthem-breach