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Signal
======
What is [Signal]?
[According to Wikipedia:][signal-wikipedia]
> Signal is an encrypted instant messaging and voice calling application
> for Android and iOS. It uses end-to-end encryption to secure all
> communications to other Signal users. Signal can be used to send and receive
> encrypted instant messages, group messages, attachments and media messages.
> Users can independently verify the identity of their messaging correspondents
> by comparing key fingerprints out-of-band. During calls, users can check the
> integrity of the data channel by checking if two words match on both ends of
> the call.
>
> Signal is developed by Open Whisper Systems. The clients are published as free
> and open-source software under the GPLv3 license.
How to install Signal in Qubes
------------------------------
**CAUTION:** Before proceeding, please carefully read [On Digital Signatures and Key Verification][qubes-verifying-signatures].
This website cannot guarantee that any PGP key you download from the Internet is authentic.
Always obtain a trusted key fingerprint via other channels, and always check any key you download against your trusted copy of the fingerprint.
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1. (Optional)Create a TemplateVM (Debian, 9 is used as an example but feel free to use any more updated by changing the 9 to a 10, etc.)
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[user@dom0 ~]$ sudo qubes-dom0-update qubes-template-debian-9
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2. Open a terminal in Debian 9 (Or your previously chosen template)
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[user@dom0 ~]$ qvm-run -a debian-9 gnome-terminal
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3. Use these commands in your terminal (If you chose a different distribution, such as buster, substitute that for xenial in the 3rd command)
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(Optional)[user@debian-8 ~]$ sudo apt-get install curl
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[user@debian-8 ~]$ curl -s -x 127.0.0.1:8082 https://updates.signal.org/desktop/apt/keys.asc | sudo apt-key add -
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[user@debian-8 ~]$ echo "deb [arch=amd64] https://updates.signal.org/desktop/apt xenial main" | sudo tee -a /etc/apt/sources.list.d/signal-xenial.list
[user@debian-8 ~]$ sudo apt update & & sudo apt install signal-desktop
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5. Shutdown the TemplateVM (substitute your template name if needed) :
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[user@dom0 ~]$ qvm-shutdown debian-9
6. Create an AppVM based on this TemplateVM
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7. With your mouse select the `Q` menu -> `Domain: "AppVM Name"` -> 'AppVM name: Qube Settings' -> OK -> 'Applications'
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(or `"AppVM Name": VM Settings` -> `Applications` ).
Select `Signal` from the left `Available` column, move it to the right `Selected` column by clicking the `>` button and then `OK` to apply the changes and close the window.
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[qubes-verifying-signatures]: https://www.qubes-os.org/security/verifying-signatures/
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[Signal]: https://whispersystems.org/
[signal-wikipedia]: https://en.wikipedia.org/wiki/Signal_(software)
[shortcut]: https://support.whispersystems.org/hc/en-us/articles/216839277-Where-is-Signal-Desktop-on-my-computer-
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[shortcut-desktop]: https://www.qubes-os.org/doc/managing-appvm-shortcuts/#tocAnchor-1-1-1
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[message]: https://groups.google.com/d/msg/qubes-users/rMMgeR-KLbU/XXOFri26BAAJ
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[mailing list]: https://www.qubes-os.org/support/
