WeChat censoring messages even outside China, study says

Users of the WeChat instant-messaging platform can have their content censored even if they leave China or switch to an overseas phone number, according to a research group.

WeChat accounts registered with a mainland China-based phone number have keywords filtered out or messages blocked anywhere in the world as long they keep the same user name, according to a study by the University of Toronto’s Citizen Lab. Accounts created abroad, such as through carriers in Hong Kong or the U.S., don’t face the same restrictions, it said.

“The idea that you can’t escape a censorship system imposed on you at the time of registration is a troubling one,” said Jason Q. Ng, a research fellow at the Citizen Lab.

The dual systems are crucial to understanding how  Tencent Holdings Ltd. can expand China’s most-popular message service overseas while still complying with domestic government controls on information. With 846 million active users on WeChat, the company scrapes news posts deemed sensitive and blocks private texts containing certain words in both one-on-one and group chats, Citizen Lab’s research on Thursday showed.

Tencent said it complies with local laws and regulations in the countries where it operates.

“WeChat has and will always adhere to Tencent’s core mission to create value,” the company said in an e-mailed statement yesterday.

The researchers tested 26,821 keywords that have been blocked on other websites, including Weibo Corp. and YY Inc. They found that 174 words and expressions, such as “Free Tibet” and “ISIS Crisis,” triggered censorship. If those words are detected by WeChat servers in China, the message won’t be sent. Bloomberg