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This paper examines methods for protection of government organization’s websites on the focus of 7 7 Cyber Attack in South Korea. On July 7, 2009, twelve websites including the websites of Cheong Wa Dae(the Presidential Office), the National Assembly, the Ministry of National Defense, top internet portals Daum and Naver, and Auction in South Korea and fourteen websites including the websites of the White House and the Department of State in US were attacked by DDoS collectively. The internet sites of South Korea and the abroad important government offices were attacked by DDoS for the first time simultaneously. The affected or zombie computers for themselves could attack the internet sites of important public organizations and agencies.
The first attack was that the affected or zombie twenty three thousand PCs in South Korea at 6 p.m. of July 7, 2009 and two thousand PCs abroad helped to attack the websites of important government organizations and agencies. The second attack happened on July 8, 2009. Sixteen thousand zombie PCs were used at the second attack.
The third attack was at 6 p.m. of July 9, 2009. Hard diskettes and data in ‘zombie PCs’ which were affected by DDoS were destroyed on July 10, 2009. Zombie PCs with malicious codes exploded for themselves from at least thirty thousand to almost sixty thousand zombie PCs. Methods for protection of government organization’s websites from cyber attacks might be considered as measures for level of citizen, for level of government organization, for state level and for inter‐�state level. Developed countries like US and Japan allocated ten percent of the total budget 10 years ago. South Korea was labeled an internet powerhouse, but Korean government ironically spent only one percent of its entire annual budget on cyber security. Budget for internet security in South Korea should be increased. All owners of virus‐�infected computers should pay immediate attention to cleaning up their operating systems.