full-disclosure - Re: Disk wiping -- An alternate approach?

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Date: Tue, 26 Jan 2010 10:08:34 -0500
From: Michael Holstein <michael.holstein@...ohio.edu>
To: "E. Prom" <e3prom@...il.com>
Cc: full-disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: Disk wiping -- An alternate approach?

> By the way, does somebody knows about the flash memory?
> Is zeroing a whole usb key enough to make the data unrecoverable?
>   

No, wear-leveling (done at the memory controller level) will dynamically
re-map addresses on the actual flash chip to ensure a relatively
consistent number of write cycles across the entire drive.

The only way to completely "wipe" a flash disk is with a hammer.

Regards,

Michael Holstein
Cleveland State University

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