Speaking on Wednesday at an event hosted by Perdue University, Mamani Older told an audience at CERIAS 2013 that massive distributed denial of service – or DDoS – attacks have become “business as usual” for Citi, and that those launching the attacks have fallen into a predictable schedule of attacks. Just this week, American Express said that it, also, has been targeted by DDoS attacks, which harness infected or cloud-based systems around the globe to flood public facing systems with junk traffic, slowing down response times severely, or knocking the Web sites offline.