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screws on outside knob

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

screws on outside knob

Postby funkyfox » 3 Nov 2014 19:03

I'm not very knowledgeable on locks or manipulating them, please do not be condescending. I was contemplating on buying this lock (link to it http://www.amazon.com/LAYKOR-Keyless-Electronic-Digital-YL-99/dp/B000VYO7Y0/ref=sr_1_2?s=hi&ie=UTF8&qid=1415059144&sr=1-2&keywords=yl+99 and large image of the screws http://www.360save.net/eBay/EP19231/6.jpg), but noticed the outside knob might be vulnerable. Tried Google searching for more information on it, but I couldn't find anything. Could the knob be opened up and allow access to the locked area without any sign of tampering? It's a shame because all the other keyless electronic locks are much more expensive.
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Re: screws on outside knob

Postby cledry » 3 Nov 2014 19:46

Looks like the screws are on the inside to me.
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Re: screws on outside knob

Postby cledry » 3 Nov 2014 19:48

OH, I see the torx screws on the back. Yes that looks pretty vulnerable, but once the keypad is accessed what do you do then?
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Re: screws on outside knob

Postby funkyfox » 5 Nov 2014 17:18

cledry wrote:OH, I see the torx screws on the back. Yes that looks pretty vulnerable, but once the keypad is accessed what do you do then?

Perhaps the lock mechanism is exposed and can be easily manipulated?
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Re: screws on outside knob

Postby Robotnik » 6 Nov 2014 0:14

funkyfox wrote:
cledry wrote:OH, I see the torx screws on the back. Yes that looks pretty vulnerable, but once the keypad is accessed what do you do then?

Perhaps the lock mechanism is exposed and can be easily manipulated?


A remote possibility, I suppose; some knobsets are vulnerable to simple bypasses like that. Without disassembling one of these, I couldn't say one way or the other.

The more likely issue in my mind is an attacker gaining access to the keypad wiring. Inducing a short or applying voltage under certain conditions can trigger an unlock on some electronic locking devices.

That said, you'd be talking about an attacker with the motivation to remove several small, difficult-to-access screws with uncommon bitting, (risking being observed all the while) and the sophistication to know what they were doing once they accessed the wiring. Even then, the chances of triggering an unlock are far from a sure thing.
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Re: screws on outside knob

Postby funkyfox » 6 Nov 2014 22:09

Robotnik wrote:A remote possibility, I suppose; some knobsets are vulnerable to simple bypasses like that. Without disassembling one of these, I couldn't say one way or the other.

The more likely issue in my mind is an attacker gaining access to the keypad wiring. Inducing a short or applying voltage under certain conditions can trigger an unlock on some electronic locking devices.

That said, you'd be talking about an attacker with the motivation to remove several small, difficult-to-access screws with uncommon bitting, (risking being observed all the while) and the sophistication to know what they were doing once they accessed the wiring. Even then, the chances of triggering an unlock are far from a sure thing.

Well put. By any chance do you know a site where I can get a .pdf of its manual or see one of these disassembled?
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Re: screws on outside knob

Postby billdeserthills » 14 Nov 2014 23:01

funkyfox wrote:I'm not very knowledgeable on locks or manipulating them, please do not be condescending. I was contemplating on buying this lock (link to it http://www.amazon.com/LAYKOR-Keyless-Electronic-Digital-YL-99/dp/B000VYO7Y0/ref=sr_1_2?s=hi&ie=UTF8&qid=1415059144&sr=1-2&keywords=yl+99 and large image of the screws http://www.360save.net/eBay/EP19231/6.jpg), but noticed the outside knob might be vulnerable. Tried Google searching for more information on it, but I couldn't find anything. Could the knob be opened up and allow access to the locked area without any sign of tampering? It's a shame because all the other keyless electronic locks are much more expensive.



This can be opened the same way as any deadlatch, via shimming but picture a 3" diameter piece of plastic pvc pipe, simply placing the
pipe over the handle and cracking the handle off will allow opening with a screwdriver, or pliers.
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Re: screws on outside knob

Postby nite0wl » 22 Nov 2014 15:45

I could not find a complete dis-assembly but the this lock seems to be sold under many different brands and one of them included a copy of the manual on their website which include a parts diagram and a partial exploded view. http://www.centurioncodelock.com.au/documents/centurion-code-lock-user-guide.pdf (PDF) It doesn't give a clear enough look at the actuator bar and latching mechanism to do more than theorize about possible exploits and bypasses.
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