DDoS attack (Distributed Denial of Service) carried out by hackers pose a threat to banking institutions and other important infrasuktur industry, as reported from databreachtoday. Serangan Cyber DDoS Dr. Dale Meyerrose said about 90% of cyber attacks involve DDoS, whether it is used as a tool for the transfer, or DDoS itself is used as a tool to attack. Meyerrose added, DDoS attacks against banks in 2012 through 2013 conducted by the group of hackers known as the Izz ad-Din al-Qassam, the longest cyber attacks faced by the financial sector of the United States. Group al-Qassam attacks known as "operation Ababil". The goal of the attack is to disrupt online financial services, not to extort money from the bank. Keamanan "Operation Ababil" trigger public fear of how the attack will affect the financial stability of the country. The attack proved that the necessary cooperation and transparency of information between banking institutions and the US government. Currently DDoS attacks increased. Although rarely heard, now that attacks have greater impact compared to 3 years ago. Keamanan Data Jarrett Kolthoff, a former intelligence agent, said the hackers launched DDoS attacks to cover more sinister action, such as theft of intellectual property and corporate secrets that aim to squeeze the company at a later date.