Not only are the messages encrypted, but the Signal server never has access to any group metadata such as the membership list, group title, or group icon. Signal allows you to create encrypted groups so you can have private conversations with all your friends at once.

There are no separate logins, usernames, passwords, or PINs to manage or lose. ★ Be Yourself - Signal uses your existing phone number and address book. Signal is the only private messenger that uses open source peer-reviewed cryptographic protocols to keep your messages safe. Signal is Free and Open Source, enabling anyone to verify its security by auditing the code. Signal uses an advanced end to end encryption protocol that provides privacy for every message every time. The server never has access to any of your communication and never stores any of your data. Using Signal, you can communicate instantly while avoiding SMS fees, create groups so that you can chat in real time with all your friends at once, and share media or attachments all with complete privacy. Privacy is possible, Signal makes it easy.

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