Two men pose with smartphones in front of a screen showing the Telegram logo in this picture illustration taken in Zenica, Bosnia and Herzegovina November 18, 2015. REUTERS/Dado Ruvic/Files
SAN FRANCISCO/WASHINGTON: Iranian hackers have compromised more than a dozen accounts on the Telegram instant messaging service and identified the phone numbers of 15 million Iranian users, the largest known breach of the encrypted communications system, cyber researchers told Reuters.
The attacks, which took place this year and have not been previously reported, jeopardised the communications of activists, journalists and other people in sensitive positions in Iran, where Telegram is used by some 20 million people, said independent cyber researcher Collin Anderson and Amnesty International technologist Claudio Guarnieri, who have been studying Iranian hacking groups for three years.
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