We created this feature to protect users against threats like the Twilio attack. To best protect your account, we strongly recommend that you enable registration lock in the app’s Settings. Using end-to-end encryption by default, Signal keeps all forms of communication on the platform. Open Signal on your phone and register your Signal account again if the app prompts you to do so. Signal is the gold standard for private messaging apps at the moment. If you received an SMS message from Signal with a link to this support article, please follow these steps: We are notifying these 1,900 users directly, and prompting them to re-register Signal on their devices. 1,900 users is a very small percentage of Signal’s total users, meaning that most were not affected. This attack has since been shut down by Twilio.

Here’s what our users need to know:Īll users can rest assured that their message history, contact lists, profile information, whom they’d blocked, and other personal data remain private and secure and were not affected.įor about 1,900 users, an attacker could have attempted to re-register their number to another device or learned that their number was registered to Signal. Signal > Download Signal Signal for Mobile Signal for Desktop Android iPhone or iPad Or visit /install from your phone Download for Windows To use the Signal desktop app, Signal must first be installed on your phone. Recently Twilio, the company that provides Signal with phone number verification services, suffered a phishing attack.

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