October 26th, 2005, 04:29 PM
electromagntic pulse and similar threats
how do you defend against the above?
October 26th, 2005, 04:40 PM
To shield electronics from EMP or EMI, the equipment needs to be encased in a metal housing, often in the form of what is known as a Faraday cage. The openings to that housing would be sealed with electrically conductive gaskets. The housings can range from tiny, such as the metal soldered on printed circuit boards, to housings that are the size of rooms that protect critical electronic equipment inside.
The cables and/or wires entering the housing need to be shielded as well, because without such shielding, a cable or wire acts as an antenna that carries an EMP or other EMI directly into the device. The shielding of such cables typically consists of a wire mesh. conduit—the metal case through which wires and cables can be placed—may work as well, for facility-level shielding.
I would suggest, however, for a cheap solution, adapting the following to your proportional needs.
October 26th, 2005, 04:43 PM
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Only those who dare to fail greatly can ever achieve greatly.
October 26th, 2005, 05:02 PM
I wouldn't really worry about the emp. The nuclar blasts that created it would get all my attention.
\"America is the only country that went from barbarism to decadence without civilization in between.\"
\"The reason we are so pleased to find other people\'s secrets is that it distracts public attention from our own.\"
October 26th, 2005, 05:10 PM
There are many things that can cause EMP other than nuke blasts, some intentional, and some not. Also, the methods to protect from EMP also go hand in hand with protecting from TEMPEST. Most definitely a worthwhile investment when dealing with sensitive data.
October 26th, 2005, 10:06 PM
Sorry to seem "picky" but what is your question about?
1. Data security re EMP/EMF.................as in TEMPEST, nonstop etc.?
2. Physical equipment security............as in continued functionality?
I have to deal with several instances of EMP damage a year..............a close lightning strike is enough............
October 26th, 2005, 10:52 PM
Well...just to contribute a little to what has already been said...
this is the latest report to Congress that I could find on HEMP and HPM...
High Altitude Electromagnetic Pulse (HEMP) and High Power Microwave (HPM) Devices:Threat Assessments
and as nihil suggested...lightning and Electromagnetic Pulse...
2.2 Heating of the lower ionosphere by the lightning electromagnetic pulse: elves
October 26th, 2005, 10:56 PM
The question may have been prompted by a recent US TV episode of Threshold, where a small EMP generator was used to take out all the computer-chip-based devices in a 100-mile radius of the center of Miami or something--and save the world!. Yes, you can generate an EMP and disable solid-state circuit and microchip-based technology within range of the device. To get 100-mile radius would require an immense amount of power and I doubt very much that the EMP generator capable of that kind of power would fit in a pickup (reference Electronic Devices for the Evil Genius).
October 26th, 2005, 11:42 PM
Like the movie ' Small Soldiers ' where they blow the transformer by overloading the system causing an EMP shorting out the chips.
October 26th, 2005, 11:49 PM
Well, suspension of disbelief was already extended to the animation of Small Soldiers in that movie. In Threshold, suspension of disbelief should be limited to the alien invasion. Adding impossible technology and generally bad science just blows the whole thing.
Isn't that Asimov's Principle? Solid SF allows for suspension of disbelief in just one thing?
Anything else is just fantasy.