Popular encrypted messaging app Signal is facing criticism over a security issue in its desktop application. Researchers and app users are raising
As mentioned in the comments, plain text keys aren't bad because they are necessary. You have to have at least one plain text key in order to be able to use encryption
The back end is open source, but sometimes they've lagged years behind releasing the source code. Other developers have stood up copies of the signal network. Session, for example.
You can self host your own signal, but it's not federated, so you'd have nobody to talk to
The back end is open source, but sometimes they've lagged years behind releasing the source code.
I think this is the more worrying part if true. The backend is licensed under the AGPL, so this would technically be a violation of their terms
Remote Network Interaction; Use with the GNU General Public License.
Notwithstanding any other provision of this License, if you modify the
Program, your modified version must prominently offer all users
interacting with it remotely through a computer network (if your version
supports such interaction) an opportunity to receive the Corresponding
Source of your version by providing access to the Corresponding Source
from a network server at no charge, through some standard or customary
means of facilitating copying of software
Edit: For anyone else reading I looked into it a bit more and looks like the issue came to a head around 3 years ago, with this comment being made after a year of missing source code. The public repo has been pretty active since then, so the issue seems to be resolved
It isn’t, because their business practices violate the four FOSS essential freedoms:
The freedom to run the program for any purpose
The freedom to study and modify the program
The freedom to redistribute copies of the original or modified program
The freedom to distribute modified versions of the program
Specifically, freedom 4 is violated, because you are not permitted to distribute a modified version of the program that connects to the Signal servers (even if all your modified version does is to remove Google Play Services or something similar).