<p>Twitter founder Biz Stone said the site, which was down altogether for about two hours, had suffered a so-called "denial of service" attack.<br />"We are defending against this attack," Stone said.<br />He added that Twitter would continue to update its site even though it remained under attack, and noted that the situation would be subjected to an investigation.<br />In a denial of service attack, hackers try to prevent access to a site by overloading it or bombarding it mainly with spam. As Stone explained, this kind of attack is most often used against online banking and credit card systems.<br />Twitter’s famous microblogging website attracted a total of 44.5 million unique visitors worldwide in June 2009, according to data on comScore. The Twitter outage began at about 1830 IST, still had lingering access problems midday. <br /></p>
<p>Twitter founder Biz Stone said the site, which was down altogether for about two hours, had suffered a so-called "denial of service" attack.<br />"We are defending against this attack," Stone said.<br />He added that Twitter would continue to update its site even though it remained under attack, and noted that the situation would be subjected to an investigation.<br />In a denial of service attack, hackers try to prevent access to a site by overloading it or bombarding it mainly with spam. As Stone explained, this kind of attack is most often used against online banking and credit card systems.<br />Twitter’s famous microblogging website attracted a total of 44.5 million unique visitors worldwide in June 2009, according to data on comScore. The Twitter outage began at about 1830 IST, still had lingering access problems midday. <br /></p>