Flash Forensics

I recently came across a couple of interesting articles on the difficulty of securely wiping data from solid state disks.
Both articles are based on a paper [pdf] from a University of California team that tested sanitizing both an entire disk and individual files on SSDs using standard ATA commands.
The outcome? Full disk sanitization was usually (but not always!) effective, while single file sanitization "consistently fail(ed) to remove data from the SSD".

Interesting stuff!

With SSDs rapidly dropping in price, and becoming more and more common in a wide vaiety of devices (especially portable devices) the paper is well worth a read for those tasked with protecting sensitive data from loss.

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