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87 lines
4.2 KiB
Markdown
87 lines
4.2 KiB
Markdown
---
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layout: doc
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title: Signal
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permalink: /doc/signal/
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---
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Signal
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======
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What is [Signal]?
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[According to Wikipedia:][signal-wikipedia]
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> Signal is an encrypted instant messaging and voice calling application
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> for Android and iOS. It uses end-to-end encryption to secure all
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> communications to other Signal users. Signal can be used to send and receive
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> encrypted instant messages, group messages, attachments and media messages.
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> Users can independently verify the identity of their messaging correspondents
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> by comparing key fingerprints out-of-band. During calls, users can check the
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> integrity of the data channel by checking if two words match on both ends of
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> the call.
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>
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> Signal is developed by Open Whisper Systems. The clients are published as free
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> and open-source software under the GPLv3 license.
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How to install Signal in Qubes
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------------------------------
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If you're a Signal user on Android, you can now have Signal inside Qubes.
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1. Install the Chromium browser in a TemplateVM.
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2. Shut down the TemplateVM.
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3. Create a new AppVM based on this TemplateVM.
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4. Launch Chromium browser in the new AppVM, type `chrome://extensions/` in the
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address bar, and follow the link to the Chrome app store.
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4. In the app store, search for "Signal Private Messenger" and install the app.
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5. The app launches automatically on first install. Follow the prompts to "link"
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this app with your phone.
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6. Signal should now work in your AppVM.
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Creating a Shortcut in the applications menu
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--------------------------------------------
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Let's make Signal a bit more usable by creating a shortcut in our desktop
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panel that launches Signal directly. This assumes that you're using KDE or Xfce in Dom0,
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you use Signal in an AppVM named `Signal`, and this AppVM uses `fedora-23` as its TemplateVM.
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1. Follow [these instructions][shortcut] to create a desktop shortcut on the Desktop of your Signal AppVM.
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Let's assume the shortcut file you get is `/home/user/Desktop/chrome-bikioccmkafdpakkkcpdbhpfkkhcmohk-Default.desktop`
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2. Copy this shortcut file to the AppVM's TemplateVM - in this case, to `fedora-23`.
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[user@Signal ~]$ qvm-copy-to-vm fedora-23 /home/user/Desktop/chrome-bikioccmkafdpakkkcpdbhpfkkhcmohk-Default.desktop
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3. You'll also want to copy across an icon for your new shortcut - you can find this at
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`/home/user/.local/share/icons/hicolor/48x48/apps/chrome-bikioccmkafdpakkkcpdbhpfkkhcmohk-Default.png`
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Copy this icon to the `fedora-23` TemplateVM in the same way as step 2.
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4. Open a terminal in your `fedora-23` TemplateVM and `cd` to `/home/user/QubesIncoming/Signal/`.
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You should find your shortcut and icon files just transferred across from the Signal AppVM.
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Move these files to the following locations:
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[user@fedora-23 Signal]$ sudo mv chrome-bikioccmkafdpakkkcpdbhpfkkhcmohk-Default.desktop /usr/share/applications/
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[user@fedora-23 Signal]$ sudo mv chrome-bikioccmkafdpakkkcpdbhpfkkhcmohk-Default.png /usr/share/icons/hicolor/48x48/apps/
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5. From a Dom0 terminal, instruct Qubes to synchronize the application menus of this TemplateVM:
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[user@dom0 ~]$ qvm-sync-appmenus fedora-23
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6. Stop both the AppVM (`Signal`) and its TemplateVM (`fedora-23`).
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The `Signal` VM will now see the desktop file in `/usr/share/applications` when it is next started.
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7. With your mouse select the `Q` menu -> `Domain: Signal` -> `Signal: Add more shortcuts`
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Select `Signal Private Messenger` 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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8. (optional, only on KDE:) Follow the `Q` menu once more, right-click on the new `Signal: Signal Private Messenger` menu item and select `Add to Panel`.
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You can now launch the Signal messenger inside its own dedicated AppVM directly from the desktop.
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The same steps should work for any Chrome app.
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-----
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[Signal]: https://whispersystems.org/
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[signal-wikipedia]: https://en.wikipedia.org/wiki/Signal_(software)
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[shortcut]: http://support.whispersystems.org/hc/en-us/articles/216839277-Where-is-Signal-Desktop-on-my-computer-
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[shortcut-desktop]: /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]: /mailing-lists/
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