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‘Phishing attacks’ may have revealed the phone numbers of 1,900 Signal users

According to the company, the phone numbers of 1,900 users could have been exposed in a phishing attack on Signal’s verification services provider. According to a blog post by Signal, the attacker may have also obtained the SMS verification code used to register with the company.

It said in a statement, ‘An attacker may have attempted to re-register their number to another device or discovered that their number was registered to Signal’.┬áSignal and Twilio Inc, which has over 256,000 businesses as customers, are investigating the attack.

Signal saw a significant increase in downloads from the Apple and Google app stores following the change in WhatsApp’s privacy policy. Signal grew in popularity after Tesla CEO Elon Musk praised it for its end-to-end encryption, which prevents third parties from viewing conversation content or listening in on calls.

Last year, the Chinese Communist Party blocked the messaging app in the country in an attempt to tightly control the flow of information. According to the mobile app analytics firm Sensor Tower, Signal has been installed approximately 58.6 million times worldwide since 2014.


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