this post was submitted on 03 Nov 2023
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Privacy
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Not really. Once data is written to disk it's more or less there forever. At least from a risk perspective.
If your disc is encrypted, you can change the disc encryption key, throw away the old key, then it doesn't matter that the data is there you no longer have the key so the date is lost.
Most people use full disc encryption, and they're unlikely to want to throw away all of their data just for signal.
Unless you're using a container to run signal, or a virtual machine, or qubes : with disc encryption, then anything signal writes to the hard disk is more or less there forever from a risk perspective.