Signal-android: Add an f-droid repo signed by WhisperSystems

[leedoyle]

I have:

• [x] searched open and closed issues for duplicates
• [x] read https://github.com/WhisperSystems/Signal-Android/wiki/Submitting-useful-bug-reports

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f-droid repo signed by WhisperSystems

Please add an f-droid repo, so people without Google Play Store could have Signal updated on a regular basis. I totally understand and partly agree with @moxie0 's critcism of f-droid security. However, one can address those issues by creating his own f-droid repo and sign it with his own key.
Projects that did so include Guardian Project. Information on how this can be done can be found here

Why this is important

Recently, a very important change has been made - it is now possible to use Signal without Gapps, and that also means that many new Signal users have to download the Signal apk off third party services, like apkpure, which is insecure and makes it impossible to update in a timely manner, which contradicts fundamental believes shared by WhisperSystems team in general and @moxie0 in particular.

[nrizzio]

Duplicate of #127.
There's discussion on the forums about this at https://whispersystems.discoursehosting.net.

[leedoyle]

@nrizzio Thanks for referencing, very interesting.
However, I believe that the issue you referenced doesn't reflect the changed situation — the possibility to use Signal without GApps and new users' needs, which manifests itself e.g. in it's being locked and limited to contributors only.

[piratenpanda]

Seems somewhat similar is coming https://github.com/WhisperSystems/Signal-Android/commit/9b8719e2d56a098502475bb5b2295c7a376d4caa

[strk]

Is this an official build fron whisper systems ? Only way I found to download a binary w/out a goigle account... https://signal.org/android/apk/

[mawed]

https://signal.org/android/apk/ is an officially build and signed by OWS!

[moxie0]

Yep, that's an official non-play self-updating build