TextSecure

<p>TextSecure was an encrypted messaging application for <a href="/facts/Android_(operating_system)/nNyHb0xz">Android</a> that was developed from 2010 to 2015. It was a predecessor to <a href="/facts/Signal_(messaging_app)/1d9mpcMH">Signal</a> and the first application to use the <a href="/facts/Signal_Protocol/63QE16cf">Signal Protocol</a>, which has since been implemented into <a href="/facts/WhatsApp/VMlSeFb6">WhatsApp</a> and other applications. TextSecure used <a href="/facts/End-to-end_encryption/e1MwRzEU">end-to-end encryption</a> to secure the transmission of text messages, group messages, attachments and media messages to other TextSecure users.
</p><p>TextSecure was first developed by <a href="/facts/Whisper_Systems/8ESmLfJB">Whisper Systems</a>, who were later <a href="/facts/Acqui-hiring/ahIn8zSk">acqui-hired</a> by <a href="/facts/Twitter/VWwDNGUm">Twitter</a>. The application's <a href="/facts/Source_code/o9J6Jv23">source code</a> was then released under a <a href="/facts/Free_and_open-source_software/1cHtjLCB">free and open-source software</a> license. In 2013, TextSecure's development was picked up by an independent group called <a href="/facts/Open_Whisper_Systems/kmBSmmDn">Open Whisper Systems</a>, who merged it with an encrypted voice calling application called <a href="/facts/Open_Whisper_Systems/kmBSmmDn">RedPhone</a> and renamed the product as Signal.
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TextSecure open-in-new

TextSecure