🥳 On this day, 10 years ago, we launched Signal on iPhone, which existed on Android as RedPhone and TextSecure 🎂

📞 Back then, Signal was only an encrypted voice calling app using the ZRTP protocol with short-authentication strings.

💬 It’s only 6 months later, that Signal Protocol-based encrypted messaging would launch.

wired.com/2014/07/free-encrypt