179 lines
6.8 KiB
Plaintext
179 lines
6.8 KiB
Plaintext
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Defeating Library and Anti-Shoplifting Systems
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Written and Produced By:
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Psionic Nemesis
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This file is intended for entertainment purposes only!
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The author cannot assume any responsibility for any
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actions taken on the part of the reader. The author
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assumes that the reader has a brain and free will.
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As such, the reader fully agrees to release the author
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of any repercussions arising from the use of the information
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contained herein.
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If you do not agree with the above statement then cease
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reading of this file.
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If you haven't guessed already this file is designed to
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tell you how to circumvent one of the more frequently used
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library and anti-shoplifting systems in use today. The system
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is called Check Point(tm) and I assume it is manufactured by
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the company with the same name. It is used widely by
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libraries and a few retail chains, as well as many
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independent stores.
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Brief Overview of System Operation:
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Realizing of course that I did not call the company to
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ask about this system and how to defeat it. I took it upon
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myself to draw several conclusions on how the system works.
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1) The system consists of a series of poles about 4-5 feet
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high at all exit points.
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2) The sensors are stuck inside the object to be protected.
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The sensors are about 2 inches by 2 inches square and can
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be disguised as something they are not.
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Example: In a retail store they are disguised as a UPC
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symbol, or price tag.
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Example: In libraries they can be marked as "Reference
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Only Not to be taken from premises" Or something similar.
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Sometimes they are printed with the words "Date Due" and
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can actually be stamped on.
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Close visual inspection of the sticker will reveal several
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factors.
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a) They might say "Checkpoint(tm)" on them.
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b) They look as if they have a spiral circuit tracing on
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themselves. This circuit is layered between the paper,
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and therefore can only be noticed when held in front
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of a light.
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It should be noted here that the stickers, ARE in fact
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an actual radio frequency circuit!!
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What has been determined is that the spiral circuit you
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see is actually and inductive coil. The paper separates
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the coil to form a capacitor. Together with the coil
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and capacitor you get an a circuit that oscillates at
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a specific frequency when energy is applied to it!!
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3) The poles located next to the exits emit an
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electromagnetic field.
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4) When the sensor sticker is brought near the poles
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something very ingenious happens. The sticker starts to
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oscillate at a particular frequency determined by the coil
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size and capacitance in the sticker.
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5) It has been determined that the frequency emitted by the
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stickers is 8.250 MHz.
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6) When the poles detect this frequency an alarm sounds.
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That's it! Really pretty simple system to understand.
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But it gets even easier to defeat it!
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There are two main ways to defeat the system.
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1) Get rid of the sticker all together.
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This is not too practical in the case of a library book as
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you may damage the pages it is adhered to.
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2) Change the resonant frequency of the circuit so the poles
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cannot detect it.
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Approach two is more my style. As my way requires no
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damage to be done to the actual book or what-have-you.
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When you purchase something they have to make sure that
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you can get it out of the store without setting off the
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alarm and getting harassed by there security.
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What they do is put a sticker on the Checkpoint(tm)
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sticker that says something like "Paid Thank You" or
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similar. If you look at the sticker closely you'll notice
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that it is actually metal!
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In brief, when metal is brought near an inductive coil it
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changes it's inductance. There are two ways of changing
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frequency in an RF circuit. One is to change the
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capacitance. Two is to change inductance.
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What you want to do is change the inductance. So get
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a piece of tin foil and tape it right up against the
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sticker! The metal (Tin foil, or any other metal) WILL
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CHANGE THE INDUCTANCE OF THE COIL, THEREBY CHANGING IT'S
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FREQUENCY SO THE POLES CANNOT DETECT IT!!! The metal piece
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does not have to be big, but make it at least 1 inch square
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just to be safe. Make sure it is flush against the sticker!
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That's all there is to it!
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Yes, it really is that simple, tin foil will do it every
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time. But as a side line here some of you may like this idea.
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I have yet to try this yet, but it sounds great in theory.
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Make a circuit that broadcasts on 8.250 MHz. Now go to your
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library or store. When you see someone walking out, like
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someone you don't like, or some old bitch lady who cut you
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off in line. You can turn on your transmitter, this in turn
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(should) activate the alarm. You see the poles just detected
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8.250 MHz from your transmitter. That person will be stopped,
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now when they get done with being harassed by the librarian,
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do it again and again. They will feel real dumb because
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everyone will stare at them. Needless to say you can just as
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easily remove one of the tags and hide it on your victim.
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Sorry I made it so easy, but what did you expect?
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Written 6-20-90
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By Psionic Nemesis
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I'd also like to thank The Carrier Culprit for his immense input into
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this file.
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****** ADDENDUM TO ABOVE ******
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Additional information conflicting with the above has just been
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discovered about the CheckPoint(tm) system. The stickers used in
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the system may not actually transmit any frequency at all. The stickers
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are in fact resonant to the frequency of 8.250 MHz. But it has been
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determined that it could be the poles that emit the frequency, and in
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fact the stickers absorb the energy emitted. When the poles detect this
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drop in power, they go into alarm. Again the above information may be
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correct, but this theory outlined here seems more likely to be true.
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If the information contained in this addendum is in fact true the idea
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of a radio transmitter used to activate the system will not work.
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This text file had already been released when this information was
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discovered. That is why I added an addendum to the above instead of
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re-typing the whole thing. If you have the old version of the file,
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please erase it and replace with this version.
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****** NOTE ******
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It should be noted that the method of attaching metal to the sticker
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will still bypass the system. The above addendum does not effect
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the information contained in the main file in anyway.
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Again the reader is cautioned that use of the information contained
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herein is illegal. As such, the reader assumes all responsibility for
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their actions.
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- Psionic Nemesis
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****** End Of File ******
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