China's Baidu Search Engine Sues U.S. Firm Over Hacking

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China's top Internet search engine Baidu has filed a lawsuit in the United States against the firm that manages its domain registration there following a hacking attack last week, it emerged on Wednesday.

The announcement comes one week after Google, which trails Baidu in market share in China, said it could abandon its Chinese search engine and perhaps leave the country entirely over cyber attacks and censorship, AFP reported.

"Baidu has filed a lawsuit against its domain name registration service provider in a U.S. court in New York, seeking damages over the incident of Baidu's service interruption last week,'' the Chinese firm said.

Nasdaq-listed Baidu said its site went down for hours after the Jan. 12 attack by a group identifying itself as the "Iranian Cyber Army," the name used by hackers who briefly shut down the Twitter microblogging site last month.

At the time, Baidu spokesman Victor Tseng said that service had been interrupted "due to external manipulation of its DNS (Domain Name Server) in the U.S.".

In its statement on Wednesday, Baidu said the software behind its domain name "was unlawfully and maliciously altered" as a result of the "gross negligence" of This led to "users from many places around the world being unable to access the Baidu Web site for a number of hours and causing serious damages to Baidu." is a leading domain registration service that manages more than 2.5 million domain names, according to the company's Web site.

Baidu had 58.4 per cent of China's search engine market in the final quarter of last year, followed by 35.6 per cent for Google China, according to Internet research firm Analysys International.