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  • Signal is a messaging app that uses end-to-end encryption

  • to keep your messages private.

  • It's available on both mobile and desktop,

  • but for this video,

  • we'll be focusing on the mobile app.

  • With Signal, the only people who can see

  • the messages you send

  • are you and the person who receives them,

  • because they're encrypted.

  • However, Signal's messages are only secure

  • if both the sender and receiver are on the app.

  • You can download Signal for iPhone or Android for free.

  • We'll be using an iPhone for this tutorial.

  • First, go to the Apple store and search for Signal.

  • Once you find it, tap on "GET" or "Download."

  • Once you've downloaded it,

  • you can sign up with your cellphone number.

  • The app can automatically detect

  • which of your contacts also use Signal,

  • and you can always click on "Invite Friends to Signal"

  • to choose more people.

  • Chats look nearly identical to iMessage,

  • with similar features, like sending texts and photos.

  • You can also make secure voice calls over a data network.

  • Each person is shown a random pair of words

  • that they can use to verify the call is secure.

  • In this case, you tell the person that you're calling

  • "chisel" and they'd reply "sociable" for verification.

Signal is a messaging app that uses end-to-end encryption

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