A denial of service attack that took down some of South Korea's highest profile Web sites on Wednesday is set to resume Thursday evening, according to computer security specialist AhnLab. The attack will restart at 6pm local time (9am GMT) and be directed at a smaller number of sites that those hit a day earlier. They will include government Web sites and the home pages of the Chosun Ilbo newspaper and Kookmin Bank.
A denial of service attack involves sending a massive volume of traffic to a Web site so that it becomes overloaded. While some users will occasionally be able to access the site being attacked most will see nothing until a network time-out message appears.