Nov 13, 2016 Here I show you exactly how bumping a lock works with a real lock, milled out so you can see the internals as they are bumped open.
A typical bump key
Lock bumping is a lock picking technique for opening a pin tumbler lock using a specially crafted bump key, rapping key or a 999 key.[1] A bump key must correspond to the target lock in order to function correctly.[2]
- 4Legal Issues
History[edit]
A US patent first appears in 1928 by H. R. Simpson called a rapping key.[3] In the 1970s, locksmiths in Denmark shared a technique for knocking on a lock cylinder while applying slight pressure to the back of the lock plug. When the pins would jump the inside of the cylinder, the plug would be able to slide out freely, thus enabling the locksmith to disassemble the lock quickly.[4] The use of a bump key was not introduced until some time later and was first recognized as a potential security problem around 2002–2003 by Klaus Noch, who brought it to the attention of the German media.[5] After further examination of the procedure, a white paper was drafted in 2005 by Barry Wels & Rop Gonggrijp of The Open Organization Of Lockpickers (TOOOL) detailing the method and its applicability.[6] A patent exists for a lock device following the same principle as the bump key from 1926–1928.
Marc Tobias, an American security expert, began to talk publicly in the United States about the technique and its potential security threats. In 2006, he released two further white papers regarding the technique and its potential legal ramifications.[4]
Mechanics[edit]
In a pin tumbler lock, when the correct key is inserted, the gaps between the key pins (red) and driver pins (blue) align with the edge of the plug, called the shear line (yellow).
A pin tumbler lock is composed of a series of spring-loaded stacks called pin stacks. Each pin stack is composed of two pins that are stacked on top of each other: the key pin, which touches the key when it is inserted, and the driver pin, which is spring driven. When the different length key pins are aligned at their tops by the insertion of the correspondingly cut key at their bases, the tops of the key pins and, consequently, the bases of the driver pins, form a shear line, so that the cylinder can be turned, rotating the key pins away from the driver pins. When no key or the wrong key is in the lock, pin misalignment prevents the cylinder from turning.[7][8]
When bumping a lock, the key is initially inserted into the key way one notch (pin) short of full insertion. Bumping the key inward forces it deeper into the key way. The specially designed teeth of the bump key transmit a slight impact force to all of the key pins in the lock. The key pins transmit this force to the driver pins; the key pins stay in place.[9] This physics action can be visualized by observing the same effect on the desktop toy: Newton's cradle. Because the pin movements are highly elastic, the driver pins 'jump' from the key pins for a fraction of a second, moving higher than the cylinder (shear line of the tumbler), then are pushed normally back by the spring to sit against the key pins once again. Even though this separation only lasts a split second, if a light rotational force is continuously applied to the key during the slight impact, the cylinder will turn during the short separation time of the key and driver pins, and the lock can be opened while the driver pins are elevated above the key way. Lock bumping takes only an instant to open the lock. The lock is not visibly damaged, although the force of the bump can leave an indentation on the front of the cylinder. Certain clicking and vibrating tools designed for bumping can also be used. These allow for rapid repetition of bumping against locks that have advertised 'bump proof' features. Only a rare few key-pin locks cannot be bumped.
A different tool with a similar principle of operation is a pick gun.[3]
Use by criminals[edit]
Lock bumping is a trend in burglaries,[10][11] which can make it easy and fast to break into homes without needing too much special equipment or leaving any trace of forced entry. It works almost as well as actually having a key,[12][13] and a set of ten rapping keys can make the criminals capable of opening 90% of common tumbler locks.[citation needed] However, criminals might choose to avoid lock bumping when stealth is required, because of the noisiness of the process. Almost all tumbler locks are vulnerable to bumping.[14]
Legal Issues[edit]
United States[edit]
Posession of lockpicking tools, such as a bump key, are highly regulated by criminal law in four states in the United States, and are considered prima facial evidence of a crime in another four states in the United States. They are generally legal in the remaining states within the U.S. [15][16]
Countermeasures[edit]
High-quality locks may be more vulnerable to bumping unless they employ specific countermeasures. More precise manufacturing tolerances within the cylinder make bumping easier because the mechanical tolerances of the lock are smaller, which means there is less loss of force in other directions and mostly pins move more freely and smoothly. Locks made of hardened steel are more vulnerable because they are less prone to damage during the bumping process that might cause a cheaper lock to jam.
In the United Kingdom, a British standard TS007 Kitemark has been legislated which benchmarks the effectiveness of bumping at 1-star level and 3-star level. The former implies a minimum bump time of 1 minute while the latter offers much greater protection at a minimum bump time of 10 minutes.[17]
Security pins (e.g. spool or mushroom pins)—even when combined with a regular tumbler mechanism—generally make bumping somewhat more difficult but not impossible.
Because a bump key must only have the same blank profile as the lock it is made to open, restricted or registered key profiles are not any safer from bumping. While the correct key blanks cannot be obtained legally without permission or registration with relevant locksmith associations, regular keys can be filed down to act as bump keys.
Trap pins that engage when a pin does not support them will jam a lock's cylinder.
Another countermeasure is shallow drilling, in which one or more of the pin stacks is drilled slightly shallower than the others. If an attempt is made on a lock that has shallow-drilled pin stacks, the bump key will be unable to bump the shallow-drilled pins because they are too high for the bump key to engage.
Locks that only use programmable side bars and not top pins are bump-proof. BiLock is an example of this technology. Many bump-resistant locks are available which cannot be easily opened through the lock bumping method.
Time locks, combination locks, electronic locks, electromagnetic locks, and locks using rotating disks, such as disc tumbler locks, are inherently invulnerable to this attack, since their mechanism does not contain springs. However, some electronic locks feature a key backup that is susceptible to bumping. Warded locks are not vulnerable to bumping, but they are vulnerable to a similar attack called a skeleton key, which is also a filed-down key.
Changing the spring tension can help reduce bumping. A few sources inside the industry offer stronger top springs for conventional pinned locks. Changing one or two top springs to a firmer spring changes the ricochet tuning of the top pins, making it hard to bump.
See also[edit]
References[edit]
- ^Graham Pulford (October 17, 2007). High-Security Mechanical Locks: An Encyclopedic Reference. Butterworth-Heinemann. pp. 76–. ISBN978-0-08-055586-7.
- ^http://www.consumerreports.org/cro/magazine-archive/2011/june/home-garden/best-door-locks/the-truth-behind-bump-keys/index.htm
- ^ abHigh Security Mechanical Locks - An Encyclopaedic Reference published by Graham W. Pulford 2007, p. 19
- ^ abMarc Weber Tobias (August 24, 2006). 'The Lockdown: Locked, but not secure (Part I)'. Retrieved January 8, 2015.
- ^The Open Organization Of Lockpickers. 'TOOOL'. Archived from the original on February 10, 2007. Retrieved February 12, 2007.
- ^Barry Wels; Rop Gonggrijp (January 26, 2005). 'Bumping Locks'(PDF). Toool - The Open Organization Of Lockpickers. Retrieved June 22, 2009.
- ^'Lock Basics and Mechanical Operation'. Toool. Retrieved August 8, 2012.
- ^Pick a Lock in SECONDS with a Bump Key - Scam School. April 14, 2010. Retrieved January 8, 2015.
- ^'Understanding Bump Keys (Video)'. L. Scott Harrell. April 19, 2009. Retrieved October 1, 2015.
- ^Steve Irvin (May 6, 2014). 'Is your home at risk? Lock-picking dangers, ways to protect yourself'. ABC15 News.
- ^'Police Across the Nation Concerned Over Rise in Use of Bump Keys'. ABC News. June 10, 2016. Retrieved July 24, 2016.
- ^'Cylinder snapping and bumping | The Crime Prevention Website'. thecrimepreventionwebsite.com. Retrieved May 23, 2019.
- ^Lock Bumping and Bump Keys. YouTube. January 18, 2007. Retrieved November 7, 2012.
- ^'WATCH: The 3D-printed 'bump keys' that can open almost ANY lock in seconds'. Jonathan O'Callaghan. Daily Mail. September 1, 2014. Archived from the original on October 2, 2015. Retrieved October 2, 2015.
- ^https://unitedlocksmith.net/blog/lock-pick-laws-rules-and-regulations-is-your-hobby-a-crime-in-your-state
- ^720 ILCS 5/19–2(a)
- ^'dhf | TS 007'. www.dhfonline.org.uk. Retrieved January 20, 2019.
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Lock_bumping&oldid=899911475'
Actually, yes. You just have to make sure that the bump key thatyou're using was crafted from a key that's of the same type of thelock that you want to bump. The lock should also have a pin tumblermechanism.
Do you need an apple keyboard for an apple computer?
Most standard keyboards can work with an Apple Mac but those specifically designed to work with a Mac will have the Mac specific keys such as Command etc. Read More
Roger knows how many keys in a piano hashe knows that some of the keys are brokenhow can he find the number of keys that work?
to find the number of keys that work roger has to add the number of the keys to the ones that broke Read More
How do the keys of woodwind instruments work?
They use the sound vibrations of the keys Read More
How do you pick a padlock?
With a tension wrench, apply pressure and torque on the cylinder with tapping at the pins with a pick, work from back to front to find the hardest pin to tap. (most resistance) Mix a combination of varying torque, pressure, and pushing the pin until it locks, once it has been locked move on to the second hardest pin. An average padlock has 2-6 pins depending on the quality most only have 4 or 3… Read More
How do you open a padlock?
The best and most effective way to open a padlock is by using the correct key or combination. There are however a variety of other ways to open a padlock. Since padlocks are designed to keep personal property secure then clearly manufacturers are always coming up with new ways to make it difficult to open them unofficially. This has created an ongoing challenge to many people across the globe in creating new ways to pick… Read More
What is the work of the functional keys on the standard keyboard?
The function keys f1 to f12, combined with the Ctrl and or Alt keys, add extra functions to the keyboard without the need for even more keys. For instance, on my Ubuntu computer, pressing down the Ctrl and Alt keys and tapping the letter T key will open a terminal window on the screen. Pressing the f11 key will toggle between a full view without taskbars showing (taking up screen space) or the normal view… Read More
How can you get your roommate to stop eating your food?
Tell him/her to buy their own food and stop eating yours. If that doesn't work,get a small refridgerater for yourself and padlock it. If that doesn't work, throw the bum out. Read More
How do the keyboards instrument work?
The keyboards instrument work when you depress the keys. Read More
Which iphone and ipod multiplayer apps is the best?
BUMP! Bump is a great app because all you have to do for it to work is just bump to iphone/ipod together.Then after that you can send messages to each other and play games. Read More
Why do The shift keys on laptop not work?
Does a 1996 Ford Contour have special ignition keys?
probably yes it started by 1990 in most vehicles for theft reasons For a 1996 Contour, the answer is NO. A standard hardware store or locksmith key will work fine. Read More
How do you fix computer keys that don't work?
There is one way to fix computer keys that don't work. Since computer stores don't sell individual keys, the only way is to buy a new whole keyboard that is a better version than the other ones so keys won't get broken. Read More
Why don't new cars have ignition keys?
They do have ignition keys. You must have the key on your person for the start button to work. Read More
How many hours are there in a standard work month?
There are 160 hours in a standard work month. A standard work week is 40 hours unless you have overtime offered regularly. Read More
What is the standard unit of measurement for WORK?
The 'ERG' is the standard unit for work or mechanical energy. Read More
Where can physical science work sheet answer keys?
How do you get the f keys to work?
You press on them until you get a sound. Read More
How to take a work keys test?
The easiest way to take a Work Keys test is to visit your Employment Security Commission. If they don't administer the test, they will be able to tell you who provides the test. Read More
Does standard mouse work with Windows 7?
Yes, standard mouse does work with Windows 7. Read More
How does a standard mouse work?
Define quality of work?
Quality of work is define as the standard of a task undertaken against the standard expected to be achieved for the same work. Read More
You are trying to pick a padlock but the pins stick to the top with the slightest tension How do you set the pins for this?
try it a few times and bend it slitly every time it doesnt work Read More
How do you fix your keyboard keys?
Is the keys on a laptop or desktop? Is on a desktop they just pop off real easy and you can replace them with new keys. If it is on a laptop they are a little harder and require some work. Read More
How do pianos and hammers work?
Piano is categorized as a percussion instrument meaning you need to hit the keys or hammer the keys to produce sound. Read More
Why are there two shift keys?
Where does Dr Keys work in the core movie?
How does a computer bus work?
What to do when laptop keys wont work?
How does a skeleton key work?
Skeleton keys are just regular keys except they usually have a funny looking shape to them . Skeleton keys will not work on any skeleton key hole because there not all the same shape and size . Therefore there's no one skeleton key that's the same . Read More
What are generic product keys for windows xp?
'Generic product keys' are keys that allegedly will work on any version of XP. The truth is that they do not, since different versions use different algorithms for checking keycodes. Read More
In volleyball which pass is best if the ball is coming toward you at your waist level?
Harcourt science answer keys?
You need to read your book and not cheat. Get to work. Read More
How does a keyboard instrument work?
You just press on the keys and they make noise. Read More
Can a diablo 2 key work for 2 diablo 2 lod CD keys?
No D2 and D2: LOD have their own different CD Keys. Read More
Why won't Ford focus remote central locking won't work?
if it doesnt work then your keys are jacked up Read More
G and H keys don't work on my PC?
the 'esc' and '`' and being depressed, not allowing 'g' or 'h' to work. Read More
Does frank billy work for standard credit union bank?
Frank Billy work for Standard credit credit union bank? Read More
Do you have to return a volleyball serve with a bump?
No, you could return it with a set or spike, though it may not work as well. Read More
What is Alicia Keys hobbies?
Alicia Keys is a well known singer and songwriter. Some of her hobbies include writing, playing piano, and doing charity work. Read More
I have 99 Ford Taurus and the key I have has a ford logo on it does that make it one of the keys with the chip in it its not one of the fat keys and it doesn't work to open my trunk only the dash?
i am a locksmith, need more info, does it work your ign, or your doors? Read More
How do you work the confetti blowers on club penguin?
Go on edit igloo and take out the confetti blower. Press any of the arrow keys to make it blow. If it does not work just yet, keep pressing the keys. It took me a while to get it to blow. Read More
I have one bump on my upper lip since I was 16 year old and I want to know how to get rid of it. I already used the cold sore cream and it doesn't work. I have that bump for a very long time.?
If the bump has been there continuously, it is not a cold sore. See a dermatologist for a diagnosis and for treatment options. Read More
SpongeBob dihybrid practice with answer keys?
How does the flare work in club penguin?
Why Does Myspace bar and arrow keys not work?
Why is that when you play Wolfquest the keys don't work?
I have episaod 2.5 you can reload the game Read More
Does PS3 work on a standard TV?
Yes it comes with connection cable for standard TV and wile it will not get HD on a standard TV it will work as good or better than the normal TV pictures you get on that TV Read More
Do the ghwt drums work with rock band 2?
I have the wii and they work on RB2 if they dont use the arrow keys on the wii romote and it will work i sware Read More
Will a keyless electric entry system work on an 1998 Ford F150. The keys seem to be worn out?
you can purchase new keys thru ford if you supply your VIN , Read More