![]() Shortly after the acquisition, Whisper Systems' RedPhone service was made unavailable. Marlinspike could help the then-startup improve its security". ![]() The acquisition was done "primarily so that Mr. The financial terms of the deal were not disclosed by either company. In November 2011, Whisper Systems announced that it had been acquired by Twitter. All of these were proprietary enterprise mobile security software. In addition to launching TextSecure, Whisper Systems produced a firewall, tools for encrypting other forms of data, and RedPhone, an application that provided encrypted voice calls. Its beta version was first launched on May 25, 2010, by Whisper Systems, a startup company co-founded by security researcher Moxie Marlinspike and roboticist Stuart Anderson. TextSecure started as an application for sending and receiving encrypted SMS messages. TextSecure's icon from May 2010 to February 2014 and from February 2014 to February 2015. In 2013, TextSecure's development was picked up by an independent group called Open Whisper Systems, who merged it with an encrypted voice calling application called RedPhone and renamed the product as Signal. The application's source code was then released under a free and open-source software license. TextSecure was first developed by Whisper Systems, who were later acqui-hired by Twitter. TextSecure used end-to-end encryption to secure the transmission of text messages, group messages, attachments and media messages to other TextSecure users. 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. ![]() ![]() TextSecure was an encrypted messaging application for Android that was developed from 2010 to 2015. ![]()
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