On Mon, Sep 23, 2013 at 11:02:45AM +0300, ianG wrote: > On 23/09/13 07:12 AM, Dev Random wrote: > >I've been thinking about this for a while now and I don't see a way to > >do this with today's mobile devices without some external help. > > > >The issue is that it's pretty much impossible to delete data securely > >from a flash device. > > Why is that?
I presume it's due to extra blocks due to overprovisioning. There is no way to verify the block you've zeroed or randomized has been really overwritten. It is much easier to destroy the secret of a cryptofs. I've just looked, and there seems to be no easy way to mount an encrypted partition on Android, though GuardianProject has a LUKS howto.
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