General > General Technical Chat
Bypassing Keypad With Magnet (video)
Ed.Kloonk:
--- Quote from: GlennSprigg on July 17, 2020, 01:02:32 pm ---It NEVER ceased to amaze me, when I worked in the security business for even large buildings
and enterprises, how even the SIMPLEST 'mechanical' means would 'circumvent' such Code-Pads etc! 8)
Like NOT CLEANING THEM REGULARLY!!! (What?). You walk up to some door access, and see say 4 buttons
that are rubbed 'cleaner' than the rest! Say... 2,4,6,8. So you KNOW the code is either that, or say 4,6,8,2...
or 2,6,8,4 etc etc. 30-secs later, your in!!! Believe me... CLEAN THE KEYPADS!! :palm:
--- End quote ---
Should be pushing the buttons with a stick anyway.
GlennSprigg:
--- Quote from: Ed.Kloonk on July 17, 2020, 05:56:05 pm ---
--- Quote from: GlennSprigg on July 17, 2020, 01:02:32 pm ---It NEVER ceased to amaze me, when I worked in the security business for even large buildings
and enterprises, how even the SIMPLEST 'mechanical' means would 'circumvent' such Code-Pads etc! 8)
Like NOT CLEANING THEM REGULARLY!!! (What?). You walk up to some door access, and see say 4 buttons
that are rubbed 'cleaner' than the rest! Say... 2,4,6,8. So you KNOW the code is either that, or say 4,6,8,2...
or 2,6,8,4 etc etc. 30-secs later, your in!!! Believe me... CLEAN THE KEYPADS!! :palm:
--- End quote ---
Should be pushing the buttons with a stick anyway.
--- End quote ---
Haha... Yep!!. Doesn't work though, when the 'pads' are 'Capacitive', or pick up 'RF' from your body!! 8)
I remember many years ago, when an Elevator was installed in a fairly remote/radio-quiet area. It used,
(as a lot of lifts do/did) your body to act as an RF Aerial to detect button touches. However, there was so
little signal strength there, it didn't work!! Was fine in a City. |O
SeanB:
They also had thermal sensing buttons on lifts, did not work out well in a fire, where the lifts all came to the floor of the fire, and stayed open.
As to the keypads, they are not secure, only really meant to keep opportunity low. Easy to tailgate most of those doors, or social engineer your way inside, and if there is an intercom you simply press all the buttons, you are almost guaranteed that somebody will let you inside without checking who you are.
Ian.M:
Tailgating and not checking visitor credentials are social problems - sack a manager and a couple of 'peons' every month for failing to follow security procedures and most such problems go away. Of course that's not possible for residential buildings - if the residents don't want to pay for a manned security desk to handle access control, they'll only get an illusion of security.
The heat sensing lift problem is obvious in hindsight, but as they presumably weren't rated for evacuation in case of fire, may even have saved lives! Of course from a fire-fighting perspective, it wasn't ideal to have the lift shaft compromised at the seat of the fire, possibly acting as a chimney, increasing the threat to higher floors and depending on the building layout drawing the fire towards an area that probably also contains the stairwell access.
GlennSprigg:
--- Quote from: SeanB on July 19, 2020, 02:01:23 pm ---They also had thermal sensing buttons on lifts, did not work out well in a fire, where the lifts all came to the floor of the fire, and stayed open.
As to the keypads, they are not secure, only really meant to keep opportunity low. Easy to tailgate most of those doors, or social engineer your way inside, and if there is an intercom you simply press all the buttons, you are almost guaranteed that somebody will let you inside without checking who you are.
--- End quote ---
Reminds me of another time. (Sorry!). Regarding intercoms. In one of our major Prisons, I tested the main
control room by hitting the intercom saying "doors 16, 18, 22 & 24 thanks!". I heard Clunk Clunk Clunk Clunk. :palm:
They were supposed to personally identify you on video, then one door opened/locked at a time. I could have
been a prisoner, and walked outside! I detoured to the control room & told them off!! Complacency!! >:(
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