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TextSecure was an encrypted messaging application for Android that was developed from 2010 to 2015. It was a predecessor to Signal and the first application to use the Signal Protocol, which has since been implemented into WhatsApp and other applications.
WhatsApp (officially WhatsApp Messenger) is an instant messaging (IM) and voice-over-IP (VoIP) service owned by technology conglomerate Meta. [13] It allows users to send text, voice messages and video messages, [14] make voice and video calls, and share images, documents, user locations, and other content.
(December 2020) (Learn how and when to remove this message) The landscape for instant messaging involves cross-platform instant messaging clients that can handle one or multiple protocols. [ 1 ] Clients that use the same protocol can typically federate and talk to one another.
Open Whisper Systems (abbreviated OWS [7]) was a software development group [8] that was founded by Moxie Marlinspike in 2013. The group picked up the open source development of TextSecure and RedPhone, and was later responsible for starting the development of the Signal Protocol [9] and the Signal messaging app.
Version 1.0 (13 August 2012) Version 2.0 (3 May 2013) Version 3.0 (9 September 2013) Version 4.0 (28 November 2013) Release 5.2 Version 5.0 (7 May 2014) Improved central message store and introduced service extension tags into the specification.
Signal also allows users to send text messages, files, voice notes, pictures, GIFs, and video messages over a Wi-Fi or data connection to other Signal users on iOS, Android and a desktop app. The app also supports group messaging, read receipts and typing indicators, both of which can be disabled.