Signal offers end-to-end encryption for secure communication, allowing users to send encrypted messages, make voice and video calls, and share media with individuals or groups.
Signal is a free, open source software application for iOS, Android, and Desktop that employs end-to-end encryption, allowing users to send end-to-end encrypted group, text, picture, and audio & video messages, and have encrypted phone conversations between Signal users.
First released in July 2014, Signal is 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. Messages and calls are end-to-end encrypted such that no third party, including Signal itself, has access to them. The encryption protocol that Signal uses is known as the Signal Protocol.
Key features of Signal include:
The core Signal Protocol was created by Open Whisper Systems. The Signal Foundation was launched in 2018 to develop Signal and the Signal Protocol. Today, Signal is used by millions worldwide as a private and secure messaging app. Users around the world rely on Signal for features like encrypted messaging and calls as well as a commitment to protecting user privacy.
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