(OT) Can data stored on an SSD be secured? | Flash Memory | Macworld

[Bill Campbell]

On Wed, Mar 02, 2011, JEROEN ELIAS wrote:
>I agree on your approach, Bill ;-)

>But still, how about the idea of "erasing" the disk by just filling it up
>with meaningless files until there are 0 bytes left?  Could anyone recover
>old data that was there before? If so, then every bit on disk has more than
>2 values: 0, 1 and something in between !?!?

>...or am I just thinking too simple here?

I'm not familiar with the physics of SSD devices, but magnetic
media is not completely erased by overwriting.  Organizations
like NSA are able to get meaningful data off of magnetic disks
even if they've been overwritten multiple times (for some
definition of multiple).

Bill
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