From: Dhu on Gate <campbell@neotext.ca>
Newsgroups: alt.global-warming,can.politics,alt.politics
Subject: Re: "Green" Solar Panels
Date: Fri, 4 Oct 2024 22:53:52 -0000 (UTC)
Organization: A noiseless patient Spider
On Fri, 4 Oct 2024 22:12:30 -0000 (UTC), R Kym Horsell wrote:
> In alt.global-warming Alan <nuh-uh@nope.com> wrote:
>> On 2024-10-01 01:40, R Kym Horsell wrote:
>>> In alt.global-warming Dhu on Gate <campbell@neotext.ca> wrote:
>>>> On Sun, 29 Sep 2024 23:19:24 -0500, AlleyCat wrote:
>>>>> Nebraska, USA: Within minutes, a single hailstorm reduced 14,000 solar
>>>>> panels, worth millions of dollars, into a pile of toxic debris-leaching
>>>>> materials like cadmium and lead into the soil.
>>>> Lotta folks don't get how fragile hi-tech shit is.
>>>> Dhu
>>>
>>>
>>> Long gone are the days of servicing your own vehicle.
>>> Apart from oiling some bearings you can't and sometimes are
>>> prohibited by law from fixing your own car.
>>> I was helping a neighbor recently and it turned out you
>>> needed to break an old mil grade encryption to even ask it here it hurt.
>>>
>>
>> What kind of car was that?
>
> I pre-answered that. :)
>
>> All cars built for sale in North America have had a standard OBD-II port
>> that can be read by various scanners costing anywhere from $20...
>> ...to a lot more depending on complexity.
>
> There's a theorem of computer science that roughly says
That's a "side effect" of completeness vs. consistency.
IF you make a system "complete", that is covering all possible
exigencies, you cannot *prove* (or guaranty) it to be internally
consistent. So we have to live with systems that don't do everything
but what they do they do "correctly". More that one "System" is
required and even then there's no guarantees of covering off all cases.
Interestingly, a "minimalist" corollary of this is that Man does not
live by bread alone, but by Every Word of G*s ;-)
For more on this, read up about B. Russel and George Cantor.
Dhu
> every program can't handle some conditions. In this case the
> car's main central processor(s) said there was no fault but the car
> would not start. After the maker offered to investigate for a 4-figure
> sum plus expenses the owner decided to break into the car's electronics
> and fix it themselves. Turned out another compter on that car's local
> network did know what was wrong and we tinkerer around until we found
> the problem. A shorted switch in the centre console.
>
>> So what was that "mil grade encryption", hmmm?
>
> Actually it was "old mil grade encryption". Anything with less than a 512bit
> key these days is "old". Again, the footnote in the original post
> gives a hint of the details.
> We looked around and found a list of relevant keys on the web and one
> of them worked for that maker in the relevant subsystem.
> It took a couple days in all but saved a few thousand. The bad switch
> was a $1 item.
> It took another day to replace. Has anyone tried to remove a centre
> console lately? Apparently you need a phd in engineering to do it.
> Or you must be willing to live with the axe marks.
--
Je suis Canadien. Ce n'est pas Francais ou Anglais.
C'est une esp`ece de sauvage: ne obliviscaris, vix ea nostra voco;-)
Duncan Patton a Campbell