Earlier this year, Donncha Ó Cearbhaill, a security researcher who investigates spyware attacks, found himself in an unusual position. For once, he became the target of hackers. “Dear User, this is Signal Security Support ChatBot. We have noticed suspicious activity on your device, which could have led to data leak,” read a message he received on his Signal account. “We have also detected attempts to gain access to your private data in Signal,” the message claimed. “To prevent this,…
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