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- PARAGON CONSULTANTS Inc. PRESENTS.............
-
- TECHINIQUES OF BURGLAR ALARM BYPASSING
- File Compiled by: THE RAVEN!!
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-
- THIS IS PART 1 OF BURGULAR ALARM BYPASSING.
-
- DISCLAIMER: This file is written for informational purposes only.
- The sysop of the bbs you got this file from does not advocate the
- breaking of any laws and will not be held accountable for misuse of
- the information contained in this file it is intended for uhhmm
- informational purposes only! yea thats it!
-
- This file may be reproduced or put into any newletter or fourm, the
- only thing asked is that proper credit is given, it took a while to
- write these files and others.
- THE RAVEN
- +=======+
-
- Now on with the shit.......
-
- Part 1 is an introduction to the various types of alarms in use today.
- So we will discuss the circuits that guard a building's perimeter.
- Therefore, they are used primarily on doors and windows. The most
- common member of this family is the magnetic switch, the little set of
- white rectangular boxes seen above doors of most businesses. RadioShack
- is one business that love to use them because they market them for there
- home security line. Part 2 will deal with second line defense, the area
- sensor. These sensors monitor a specific area rather than a specific
- point of entry. These are often called motion detectors, sinnce anyone
- moving about a guarded room will be detected.(like no shit!) The way in
- which these sensors achieve this goal varies between components. And in
- Part 3 I will give you some general notes and observations on alarm
- bypassing.
-
- 1.0 MAGNETIC CONTACT SWITCHES
-
- The magnetic switch is the most common of all hardwired components found
- on doors and windows around the world. It consits of two individual pieces,
- the switch itself, and the companion magnet (see Fig 1-1). The switching
- mechanism is a spring loaded lever that makes contact with a stationary
- metal arm when the companion magnet is near. So the magnetic switch is a
- normally closed circuit. When the magnet is pulled away (see Fig 1-2), the
- lever is released from the stationary arm and the circuit is no longer
- complete. So, the opening of aprotected door or window removes the magnet
- from the switch, and since the circuit is no longer complete the alarm
- sounds (simple electronics!!). Since the circuit of a magnetic contact
- switch in normally closed wires cannot be cut to defeat the system cause
- this has the same effect as removing the companion magnet.
- The magnetic switch offers more opertunity for jumpering than does any
- other individual component. since the wires are often visible, one only
- needs to remove the insulation, and place a small wire across the circuit
- to defeat and bypass the switching mechanism (fig. 1-3). The main problem
- for the thief then is to locate the wires if they are not visible. Often
- they are hidden behind baseboards or trimming or are snaked through the
- studs behind the drywall. They may be uncovered from the outside after
- the bricks and wallboard have been removed.
-
- Figure 1-1 Figure 1-2
- Closed Switch Open Switch
- I II I I II I
- I II I I II I
- I(------)II(-------)I I(--------)II(-------)I
- > I(...../)II( + )I I(:....../)II( M )I
- =======@@: / )II( )I =======@@: / )II( I M )I
- I( / )II( ### )I I( / )II( S A )I
- I( /--:)II( ### )I I( / )II( S G )I
- < I( :)II( ### <---MAGNET I( -:)II( I N )I
- ========@@: :)II( ### )I =======@@: ^ :)II( N E )I
- I( :::::)II( ### )I I( ...|..:)II( G T )I
- I(------)II( ### )I i( ---|---)II(--------)I
- I II( )I |
- I II( + )I Connection broken
- Because of missing magnet
- so the alarm sounds!!!!!!
-
- Figure 1-3
-
-
- I II I
- I II I
- =============*==@ II I
- * I II I
- * I II I
- =============*==@ II I
- I II I
- ^
- |_ Jumper Wire
-
- Usually one has to already be inside to get at the wires however ther are
- a few tricks that burglars employ. Often a hole can be drilled into the
- window and jumpering is done if the wires are visible. One way to make the
- wires visible is to unscrew the switch and give it a little pull. The wires
- will probably be stapled and may be difficult to pull, but there is a
- chance that the wires are just stuffed in between the studs. This is done
- carfully so the switch is not removed too far from the magnet. Also if
- possible the magnet may be unscrewed from the window itself and taped to
- the switch (It was done to a Radio Shack!). The door or window could then
- be freely opened.
-
-
- 1.1 Window Foiling
-
- Window foiling is probly the alarm which everyone is familiar with. It
- graces the windows of nearly every store in America, and rightfully so, it
- is very difficuly to bypass successfully BUT NOT IMPOSSIBLE!
- When a window is to be monitored by foil the foil is stretched around the
- perimeter of the window. Two terminals are placed at the end of the foiling
- and are connected to the rest of the circuit. The foil is now part of a
- normalclosed circuit, its so fine that if a break occurs in the glass, the
- foil will tear, opening the circuit and causing the alarm to ring.
- Foiling is often coupled with magnetic switches and there lies the big
- problem for the burglar. If he cannot break the window how can he/she
- enter? There are three primary methods that burglars employ when defeating
- window foil. Amateurs on the other hand who dont fully understand the
- principles of window foil cicuit try some crude methods that are usually
- unsuccessful. They sometimes smash a window and hope that the foil won't
- break as well. The odds of this happening are astronomical, they better
- try playing lotto! Amateurs even try cutting the entire window out since it
- allows them to get access to the jumper terminals. But any slight movement
- in the wrong direction sets off the alarm (while they're holding a 20
- pound sheet of glass).
- One method that will work provided the window is large enough (or the
- burglar is small enough) is the cutting of a crawl space in the window that
- is far enough from the foil so it can be undisturbed. The entire window
- is covered with a strong duct tape, leaving blank the hole intended to be
- cut. The hole preferbaly square, is scribed with a high quality diamond
- tipped glass cutter. The cutter is then used to trace and retrace the
- scribbed line until the glass get quite thin. When the lines have been
- determined to be deep enough, a thin layer of modelling clay is applied
- to the glass area that is to be removed. Then a thick wet newspaper
- (to shield the noise) is laid over the potential hole and tapped sharply
- around the scribbed lines. With practice the glass will break only where the
- lines were cut. The duct tape serves as a shock-absorber, and also keeps
- the plass from shattering and falling to the floor if a mistake is made.
- The layer of clay serves to deaden the sound of the glass as it hits the
- floor inside.
- Another method often often used is the jumpering of the two foil terminals
- If they are visible a small hole is drilled into the glass near them
- (when drillin glass always use a carbide bit). A wire is then laid across
- the terminals to completely bypass the whole foiling system. The wire is
- then fasten securly to the terminals to avoid having it fall off during the
- mission. At anyrate if jumpering is successfully accomplished, the entire
- pane of glass can be shattered without setting off an alarm.
- The third method is utilized when one has prior access to the premises.
- When no one is looking use a razor blade to slice a line thruogh the foil.
- The slice is clean enough to so it can't been seen easily but also deep
- enough to the the circuit is not intact. When the store owner decides to
- arm the alarm (turn-on) he'll discover that the zone zone covering the
- window is not properly armed. After a quick survey of all the window foil
- he figures that the system must have malfunction and decides to call the
- repairman first thing in the morning. If this occurs the window containing
- the cut foil will remain unguarded all night. It is possible that the owner
- could call a repairman that instant, but AN INTELLIGENT burglar will be
- keeping his/her eyes out for that. If the owner finds the tear there really
- nothing much he can do without the proper tool and supplies. From the
- burglar's vantage point he/she could be able to see any repairs the owner
- is making on a particular window and act accordingly.
- NO, window foiling is not particulary easy to bypass, but remember it is
- not necessary that the burglar enter through a window either. They know
- that a window that has just been cut is not a pleasant thing to crawl
- through, and it's not terribly wise place to be seen crawling. A large
- hole cut in a windoew just has "BURGLARY" written all over it for any
- passer-by.
- Well I've given you the basic and there is more to encounter so look
- for part 2, so until the don't get caught and do it right!
-
- THE RAVEN
- +=======+
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- Also look for my other text files on: Van Eck HAcking,Burglar Alarm Bypass
- part 2 & 3, Beyond Van Eck Phreaking and THE CIA SERIES FILES!
-
-