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Warded dimple key

Information about locks themselves. Questions, tips and lock diagram information should be posted here.

Warded dimple key

Postby davou » 28 Jun 2007 15:40

Is there any locks that make use of this design? I'm thinking of a warded key that has dimples carved into it that activate the lever only provided pins in it are depressed in the same way a normal tumbler would work.

I imagine it would be hard to get a pick past the wards, and then still manage to manipulate the pins.
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Postby mh » 28 Jun 2007 16:12

I've seen pictures of a key that had both a double-bitting (for levers) and dimples (that had to be there so the key could be turned and then further inserted into the lever part) -
I think by Mottura.

Cheers,
mh
"The techs discovered that German locks were particularly difficult" - Robert Wallace, H. Keith Melton w. Henry R. Schlesinger, Spycraft: The secret history of the CIA's spytechs from communism to Al-Qaeda (New York: Dutton, 2008), p. 210
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Postby cjames73 » 28 Jun 2007 17:02

mh wrote:I've seen pictures of a key that had both a double-bitting (for levers) and dimples (that had to be there so the key could be turned and then further inserted into the lever part) -
I think by Mottura.

Cheers,
mh

cisa also make a lock that fits over the keyway of their lever locks.
Image
the key is inserted, turned 90 deg then pushed into the lever lock.
i think this would be almost impossible to pick.
Image
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Postby Eyes_Only » 28 Jun 2007 17:06

I think I've seen some of these on eBay before. Looks mighty wicked. I give ToooL about 5 years and someone there will get it open I bet.
If a lock is a puzzle, then its key is the complete picture
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Postby cjames73 » 28 Jun 2007 17:15

there are tools to open these but they are restricted.
toool are probably working on there own version as we speak :lol:
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Postby TOWCH » 28 Jun 2007 18:00

cjames73 wrote:
mh wrote:I've seen pictures of a key that had both a double-bitting (for levers) and dimples (that had to be there so the key could be turned and then further inserted into the lever part) -
I think by Mottura.

Cheers,
mh

cisa also make a lock that fits over the keyway of their lever locks.
Image
the key is inserted, turned 90 deg then pushed into the lever lock.
i think this would be almost impossible to pick.


It would be a fun excercise in tool design. Warding can really become a headache in high security tooling, but warding compromises the strength of a key so fortunately, they can't make things too nightmarish without making the lock impractical.
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Postby davou » 28 Jun 2007 18:45

cjames73 wrote:
mh wrote:I've seen pictures of a key that had both a double-bitting (for levers) and dimples (that had to be there so the key could be turned and then further inserted into the lever part) -
I think by Mottura.

Cheers,
mh

cisa also make a lock that fits over the keyway of their lever locks.
Image
the key is inserted, turned 90 deg then pushed into the lever lock.
i think this would be almost impossible to pick.


do you know what sort of mechanism is operated by the notches carved into the (shank?) of that key? (the ones near the bit, not the lettering)
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Postby cjames73 » 28 Jun 2007 18:50

its a 11 pin tumbler lock.
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Postby davou » 28 Jun 2007 19:23

so the lever mechanism has pins inside it too? or are the square cuts just on there to get past the outer lock?

On a related note, this outer lock looks particularly vulnerable to a flush cut saw.... Looks as if it would be easy enough to pry it askew and just attack the two bolts that hold it on, have you worked with it?
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Postby cjames73 » 28 Jun 2007 19:32

this lock sits directly over the keyway of the lever lock but the pin tumbler keyway is 90deg to the levers keyway.
once the key goes into this first lock it is turned the 90 deg then pushed through into the lever lock.
the key then opens the lever lock in the normal way.
i think bypass of this lock should only be discussed in the advanced forums from now on. :wink:
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Postby cjames73 » 28 Jun 2007 19:39

that last post sounds too confusing,

the lock shown is just a 11 pin tumbler lock which affixes over the keyway of the lever lock.
the dimples on the key operate only this lock allowing the key to turn 90 deg.
once at 90 deg, the key is pushed through this lock and into the lever lock which the bits on the key operate seperately.
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Postby davou » 28 Jun 2007 20:12

cjames73 wrote:i think bypass of this lock should only be discussed in the advanced forums from now on. :wink:


:( I didnt realize that sawing constituted that.... sadly I cant even apply for that section till at least a few months. Makes me sad considering it would compliment my trade program.

Its a very interesting lock though!
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Postby Schuyler » 28 Jun 2007 20:15

Destructive Entry, in general, is reserved for the advanced forums.
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Postby davou » 28 Jun 2007 20:38

ah, I had assumed in my in-experience that the advanced forum was for non destructive bypass heh. Does that mean we cant talk about kicking in a door in these forums? :wink:
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Postby Eyes_Only » 28 Jun 2007 20:44

You could but I doubt most people there would really offer much advice and support to such a discussion anyways.
If a lock is a puzzle, then its key is the complete picture
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