The accusation came as Ebay became the latest US internet company to be dragged into a public controversy over the potential use of its online service to aid Chinese monitoring of dissidents.
According to internet researchers in Canada, the Chinese arm of Skype has been routinely making and storing copies of politically sensitive text messages that users of its software tried to send. The joint venture is majority owned by Chinese Tom Online, which formed an alliance with Ebay three years ago.
The report, by the Information Warfare Monitor and a group under the OpenNet Initiative, has revived concerns about the role played by international companies in China's powerful and multi-layered internet censorship system.
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