[BITList] not easy

[franka]

Colin,
stuxnet is only a speed control  program (PLC or programmable logic 
control) designed to run an electric motor the damage it causes is by 
changing the speed to the extent that mechanical damage takes place at 
the same time suppressing any alarm outputs, once this has happened one 
is left with a machine that in this case because it is a high speed 
device is U/S and the damage is done, however like any other loadable 
program it can be removed, the hard part is finding a replacement 
program that hasn't also been corrupted or writing a new one to install 
on the units that haven't shown disruptive symptoms yet, all of which 
serves the purpose of shutting the units down and causing doubt and 
uncertainty in the security of the control systems. Under normal 
circumstances one would have support from the original manufacturer but 
in this case I cant see the Germans wanting to be seen to break the UN 
embargo
frank


On 1/25/2011 12:25 AM, s14engine wrote:
> frank
> stuxnet is far more complicated than you envisage.
> if stuxnet was as relatively easy to fix as you opine it would have 
> been done long ago.
> obviously,  who ever produced it would make it so simply to get by.
> from what I read, stuxnet had been introduced quite sometime ago and 
> had laid dormant as designed.
> appears there are many layers to it, it has slowed down or stopped 
> iran’s  nuclear ambitions to this point.
> colin
> *From:* franka <mailto:franka at iinet.net.au>
> *Sent:* Monday, January 24, 2011 9:30 AM
> *To:* BitList <mailto:bitlist at lists.bcn.mythic-beasts.com>
> *Subject:* Re: [BITList] no imuunity
> Colin
> I agree, the delivery system I referred to is how the cyber attack 
> would be delivered, as you point out one only has to bring some pretty 
> mundane things to a standstill to cause  chaos and to harden all these 
> systems in a developed country is an imposable task and to keep 
> current even more imposable, so like the nuclear deterrent it boils 
> down to a stand-off. stuxnet is relativity easy to fix really as all 
> one has to do is wipe the code and reload with the original Siemens 
> code once the problem was discovered always assuming that it wasn't 
> Siemens who embedded the code in the first place
> frank
>
>
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