![]() The messages are encrypted with the Signal Protocol, which multiple cybersecurity researchers found to be very strong. Signal uses robust end-to-end encryption, which means that the messages you send and receive cannot be accessed by anoyone, not even Signal itself. ![]() Signal now has tens of millions of users, many of whom are journalists, whistleblowers, and political activists-in short, people whose personal safety depends on staying as safe and anonymous as possible. ![]() It hit the market in 2014, and its user base has grown considerably since then. Signal is a free and open-source app that was developed by the non-profit Signal Foundation and Signal Messenger LLC.
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