SCMP

Is China’s ‘reverse Great Firewall’ quietly blocking global access to official data?

For overseas researchers, policymakers, businesses and casual users alike, access to China’s public information is quietly shrinking as a growing number of official websites go dark outside the country, a new study has found.

The contraction is far from marginal. A number of Chinese government websites were inaccessible from outside the country, the findings showed, indicating the emergence of a “reverse Great Firewall”.

This suggests a deliberate effort by Beijing to prevent foreign data mining and open-source intelligence gathering, according to research findings published this month.

The paper, published in the Journal of Cybersecurity on February 5, said geo-blocking practices were “core in this development”.

Such internet filtering restricts access to online content by identifying where a user is located through their internet protocol or IP address and blocking users from certain regions.

“China’s authorities pioneer geo-blocking in the same way as they pioneered the ‘original’ Great Firewall,” wrote the paper’s author, Vincent Brussee, a PhD candidate at Leiden University in the Netherlands.



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