

Privacy isn’t an optional mode - it’s just the way that Signal works. Say anything – State-of-the-art end-to-end encryption (powered by the open source Signal Protocol™) keeps your conversations secure.Signal’s advanced privacy-preserving technology is always enabled, so you can focus on sharing the moments that matter with the people who matter to you. Send and receive high-fidelity messages, participate in HD voice/video calls, and explore a growing set of new features that help you stay connected. We created this feature to protect users against threats like the Twilio attack.Millions of people use Signal every day for free and instantaneous communication anywhere in the world. To best protect your account, we strongly recommend that you enable registration lock in the app’s Settings. Open Signal on your phone and register your Signal account again if the app prompts you to do so. 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. Recently Twilio, the company that provides Signal with phone number verification services, suffered a phishing attack.
