[dm-crypt] The future of disk encryption with LUKS2
arno at wagner.name
Mon Feb 8 22:10:53 CET 2016
On Mon, Feb 08, 2016 at 21:51:34 CET, Sven Eschenberg wrote:
> >And new technologies may change this---not just SSDs, but modern
> >high-capacity drives that must rewrite many, many sectors to write
> >one. (Yes, I know this also argues that those headers should be
> >far away from each other. So be it. If such scattered headers
> >don't prevent resizing, I don't care. Except maybe for secure wipe.)
> Well, if we talk about SMR, small changes will be written to the
> random IO section of the drive and merged later. With those drives
> you'll probably never know if there's parts of the old header
> lingering around someplace else.
Just as with SSDs and hybrid drives. On these, the LUKS
key-management features potentially lose the secure
key-slot deletion property.
We cannot really fix that, we can only warn of it.
Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno at wagner.name
GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718
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