Signal is a cross-platform encrypted messaging service develope... - dofaq.co
signal (software)

Signal is a cross-platform encrypted messaging service develope...

wikipedia - 17 Jan 2021
Signal is a cross-platform encrypted messaging service developed by the Signal Foundation and Signal Messenger LLC. It uses the Internet to send one-to-one and group messages, which can include files, voice notes, images and videos.[16] It can also be used to make one-to-one and group voice and video calls,[17][18] and the Android version can optionally function as an SMS app.[19]

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