electromagntic pulse and similar threats
Page 1 of 4 123 ... LastLast
Results 1 to 10 of 35

Thread: electromagntic pulse and similar threats

  1. #1
    Junior Member
    Join Date
    Oct 2005
    Posts
    2

    electromagntic pulse and similar threats

    how do you defend against the above?

  2. #2
    Senior Member hesperus's Avatar
    Join Date
    Jan 2005
    Posts
    416
    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.
    http://www.military-information-tech...cfm?DocID=1185

    I would suggest, however, for a cheap solution, adapting the following to your proportional needs.

    http://zapatopi.net/afdb/build.html
    .

  3. #3
    Junior Member
    Join Date
    Aug 2004
    Posts
    14
    http://www.geocities.com/CapeCanaveral/5971/emp.html
    for homework write google rulez 1000 times and try to remember it next time
    Only those who dare to fail greatly can ever achieve greatly.

  4. #4
    AO Guinness Monster MURACU's Avatar
    Join Date
    Jan 2004
    Location
    paris
    Posts
    1,003
    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.\"
    Oscar Wilde(1854-1900)

  5. #5
    Senior Member
    Join Date
    Jan 2002
    Posts
    218
    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.
    \"Computer games don\'t affect kids; I mean if Pac-Man affected us as kids, we\'d all be running around in darkened rooms munching magic pills and listening to repetitive electronic music.\" Kristian Wilson, Nintendo, Inc. 1989

  6. #6
    Super Moderator: GMT Zone nihil's Avatar
    Join Date
    Jul 2003
    Location
    United Kingdom: Bridlington
    Posts
    17,190
    Errrrr....................Darlene~

    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............
    If you cannot do someone any good: don't do them any harm....
    As long as you did this to one of these, the least of my little ones............you did it unto Me.
    What profiteth a man if he gains the entire World at the expense of his immortal soul?

  7. #7
    T̙͓̞̣̯ͦͭͅͅȂͧͭͧ̏̈͏̖̖Z̿ ͆̎̄
    Join Date
    Dec 2004
    Posts
    3,171
    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...

    http://72.14.207.104/search?q=cache:...ient=firefox-a
    High Altitude Electromagnetic Pulse (HEMP) and High Power Microwave (HPM) Devices:Threat Assessments

    and as nihil suggested...lightning and Electromagnetic Pulse...

    http://www-star.stanford.edu/~vlf/pu...is/node13.html
    2.2 Heating of the lower ionosphere by the lightning electromagnetic pulse: elves

  8. #8
    Banned
    Join Date
    Apr 2003
    Posts
    1,147
    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).

  9. #9
    T̙͓̞̣̯ͦͭͅͅȂͧͭͧ̏̈͏̖̖Z̿ ͆̎̄
    Join Date
    Dec 2004
    Posts
    3,171
    Hi rapier57,

    Like the movie ' Small Soldiers ' where they blow the transformer by overloading the system causing an EMP shorting out the chips.

    Eg

  10. #10
    Banned
    Join Date
    Apr 2003
    Posts
    1,147
    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.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •