a. Disclosure: secret information known. Recent security incident i.e. let us consider Sony system hacking. On November 24, 2014, a hacker group which identified itself by the name \"Guardians of Peace\" (GOP) leaked a release of confidential data from the film studio Sony Pictures Entertainment. The data included personal information about Sony Pictures employees and their families, e-mails between employees, information about executive salaries at the company, copies of then-unreleased Sony films, and other information. After hacking they disclose the information i.e complete story regarding the upcoming movie in internet(James Bond sereies). b. Disruption: problems which interrupt an event, activity, or process. Servers may be taken down completely, data wiped and digital intellectual property released on the internet by attackers. Victim organisations could be hounded by media inquiries for response and status, and government reaction and statements may increase the visibility and chaos of the attack. Like this type massive attack I never seen. But recently some hackers enters into college websites and stole the information from that sites then after they swiped it out. I never think these were easily preventable. Solution a. Disclosure: secret information known. Recent security incident i.e. let us consider Sony system hacking. On November 24, 2014, a hacker group which identified itself by the name \"Guardians of Peace\" (GOP) leaked a release of confidential data from the film studio Sony Pictures Entertainment. The data included personal information about Sony Pictures employees and their families, e-mails between employees, information about executive salaries at the company, copies of then-unreleased Sony films, and other information. After hacking they disclose the information i.e complete story regarding the upcoming movie in internet(James Bond sereies). b. Disruption: problems which interrupt an event, activity, or process. Servers may be taken down completely, data wiped and digital intellectual property released on the internet by attackers. Victim organisations could be hounded by media inquiries for response and status, and government reaction and statements may increase the visibility and chaos of the attack. Like this type massive attack I never seen. But recently some hackers enters into college websites and stole the information from that sites then after they swiped it out. I never think these were easily preventable..