This is a most excellent place for technology news and articles.
But surely if it was stored encrypted, it would still need a key to unlock that info. Which would be on your PC. And could therefore be used by anything else to unlock your data.
The only safe way would be encrypt it with a password that only you know, and you'd need to enter before getting back into the software. And there couldn't be any "I forgot my password" function either. You lose it, the data is gone.
I told the guy I buy a certain thing that should be legal in this state from that trusting Signal is a bad idea and he should use some coded language if we were going use it. I do anyway, but I doubt that matters.
Under normal circumstances I wouldn't expect any privacy between processes on a desktop OS under the same UID.
If you use Chrome's password manager on Windows your password database is unlocked with your password upon login and is available to every process you run.
There's only so much you can do, as an app, to protect against OS deficiencies.
The desktop app on Windows is a sacrifice of security for convenience.
