Re: Hard Drive Write Blocker

From: adamdat_private
Date: Mon May 28 2001 - 15:37:22 PDT

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    This type of product has been developed by a Western Australian company
    called Secure Systems, from what i understand its a device that sits
    between the drive and the controller and only allows autherised access to
    the device, it also uses some form of encryption. I haven't seen the
    device so im not sure how well it works bit take a look at:
    
    http://www.securesystems.com.au/SiliconDataVault.html
    
    
    Adam
    
    
    On Mon, 28 May 2001, Wouter Slegers wrote:
    
    > On Thu, May 24, 2001 at 04:03:15PM +0200, Jochen Kaiser wrote:
    > > There is a group of similar products available which do far more:
    > [SNIP]
    > > There are at least 3 product which handle this. the one we test at the moment
    > > is http://www.daten-airbag.de/textvers/index.html
    > If I understand the information on this device correctly, this is a
    > modified BIOS disabling writes to the disk. This only works when all
    > disk access is via the BIOS, so this will not work with anything
    > directly accessing the IDE/ATA-controllers (e.g. OSes like *BSD,
    > SMART-disk-managementsoftware, maybe even the newer NT ATAPI-drivers?)
    > with writes to 0x01f0-8.
    > To block these attacks, one still needs to have something physically
    > interposed somewhere in the path from PCI-bus via controller to the
    > disk(s), preferbly just before the disks.
    > If there are ready-to-run chips or sourcecode for simple processors that
    > can interpreted the diskside of the ATA-commands, one could make an
    > "ATA-firewall" that would allow this kind of write-protection in a more
    > generic way. Building this yourself should be possible, but is
    > non-trivial to get right.
    >
    > With kind regards,
    > Wouter Slegers
    > Your Creative Solutions
    >
    



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