A recent study by the Global Network Initiative, a group that represents academics, investors, civil society organizations and companies, has cautioned against the human rights risks of censoring online terror content.
Internet companies acting as intermediaries should not be required to monitor third-party terrorist content that they host or transmit, or face direct or indirect liability from governments for such content, according to the study. Such requirements and liabilities may lead companies to go overboard in the removal of controversial content, according to the report.
The companies don't expect to share hashes until early next year after the technical work is completed. They are also open to including other firms that are interested in joining the initiative in the future.
[With additional reporting by Peter Sayer in Paris]
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