Re: Wanted: Secure-delete utility for Linux

Charles Cazabon (charlesc-linux@qcc.sk.ca)
Tue, 22 Dec 1998 09:06:31 -0600


On Tue, Dec 22, 1998 at 04:21:03AM -0500, Dave Cinege wrote:
>
> AFAIK DoD military grade wiping is zero->random->zero->random->zero.

Actually, it's all-bits-zero, all-bits-one, all-bits-zero. This prevents
people from reading the previous data from residual magnetic fields underneath
a disk which has simply been wiped with zeroes, etc. The complete cycle for
each bit is enough to minimize this risk.

Charles Cazabon

-- 
----------------------------------------------------
Charles Cazabon           <charlesc-linux@qcc.sk.ca>
Any opinions expressed are just that -- my opinions.
----------------------------------------------------

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/