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?
That means
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
While I get wear leveling is a problem, I'm not sure if the flash in a phone
is even going to use wear-leveling, but say for the sake of argument it
does. It is however not a completely brand-new problem, relatedly spinning
disks now and then suffer sector failures, and the failed sectors are
On 09/23/2013 10:02 AM, ianG wrote:
The issue is that it's pretty much impossible to delete data securely
from a flash device.
Why is that?
The flash memory controller hides the real storage cells from you and
spreads writes across all cells equally for wear-leveling. You cannot
directly
Adam Back a...@cypherspace.org writes:
Apparently or so I've heard claim SSDs also offer lower level APIs to
actually wipe physical (not logically wear-level mapped) cells, to reliably
wipe working cells. Anyone know about those? They could be used where
available and to the extent they are
On Mon, Sep 23, 2013 at 1:25 AM, Adam Back a...@cypherspace.org wrote:
For wear-leveling its more tricky, but it I think the trick to deletion
would be to delete and temporarily fill the disk - even wear leveling has to
delete then.
Reardon et al have some good analysis of this [1,2]. They
