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<div class="moz-cite-prefix">On 21/11/2023 22:00, sb wrote:<br>
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<blockquote type="cite"
cite="mid:5ECC1B55-D91B-4067-95B2-3508C6BDB896@riseup.net">
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<div dir="auto">Hi all,<br>
<br>
Long time lurker here, hi. The question is how deep do you want
to go?<br>
<br>
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</blockquote>
<p>Not too deep if I'm honest. The main thing is this. I would like
to be able to say to people that donate their phones for reuse
something like. <br>
</p>
<p>"We wipe the user data from the phone in a way which makes it
impractical for the next user to read it."</p>
<p>So not impossible / military grade no fragments etc. But in
practical terms it's not going to happen with any off the shelf
tools. <br>
</p>
<p>In all likelihood a factory reset would be adequate, but I would
like to go further and prevent people from using a tool like dd
rescue (gui) to recover files for phones before they were
encrypted by default. <br>
</p>
So some kind of tool to write zeros, overwrite old data seems like a
good idea. Any suggestions welcome for android pre-10 <br>
<p>So I do want to avoid having to install a new OS as that'll
probably be overkill for this project I would hope. </p>
<p>Thanks everyone for their help so far. <br>
</p>
<div class="moz-cite-prefix">On 22/11/2023 14:09, Michael Rogers
wrote:<br>
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<blockquote type="cite"
cite="mid:6c556c6f-4f1b-461d-83d6-6544af37c599@briarproject.org">On
21/11/2023 22:00, sb wrote: <br>
<blockquote type="cite" style="color: #007cff;">When doing a
factory reset, there is actually a duplicate hidden partition of
the main one, that just gets reloaded onto the main one if it
goes down. When you flash the bootloader with another manager,
that's how you get access. Hope that makes sense. I have no idea
about iPhone s.
<br>
</blockquote>
<br>
I think this is only the system partition though, not the user
partition where all your personal data's stored. A factory reset
should wipe the user partition but not either of the system
partitions. <br>
<br>
</blockquote>
<p>That was the impression that I got too. This would be good to
confirm one way or other. <br>
</p>
<p>nice one<br>
Mick<br>
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