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Signal under fire for storing encryption keys in plaintext
(stackdiary.com)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
Signal seem to be the least compromising messenger app out there with their privacy policy and open source code base. It's only natural they are frequent victims of FUD.