Collaborate Disseminate
I’m currently having a problem with my V9-T557 card reader. My house uses a door lock with a magnetic lock and a V9-T557 card reader. The problem arose when we lost all the mechanical keys and the previously used cards.
Now I need to creat… Continue reading How can I create a card using a v9-T557 card reader? [closed]
Your roller doors might be smooth, but they’ll never be this smooth. Californian company Hover Doors uses permanent magnets to float heavy sliding doors as if they’re mag-lev monorails, for super-quiet, minimal-effort opening and closing.Continue Readi… Continue reading “Hover Doors” put frictionless mag-lev in your living room
While most of us have been content with swing and sliding doors for the vast majority of our needs around the home, the revolving door remains popular in a wide …read more Continue reading Revolving Doors Aren’t Just Annoying, They’re Energy Saving Too
I would like to stop using keys for my building door. I set up a programmable device that can sense when the call button is pressed.
Using morse code, I can enter 4 digits corresponding to a synchronous security token. I can set a maximum … Continue reading Security of a synchronous token intercom [closed]
Folks entering shopping malls, airport lounges and office buildings could soon be welcomed by colorful greetings, important messages and of course adverts as they approach the sliding doors. LG and Assa Abloy are partnering to develop automatic doors i… Continue reading LG’s transparent OLED displays to be used in automatic sliding doors
In episode 89 of our monthly show Scott and Tom discuss everything you need to know about home security with physical security expert, Patrick McNeil. We delve deep into the world of locks, lock bumping, doors, windows, surveillance cameras, alarms, an… Continue reading The Home Security Episode – Locks, Doors, Cameras, and More!
My question is around best practices and risks regarding labelled employee ID badges and access control systems.
My company is moving into a new office, and it has an access control system with printable RFID keycards. This… Continue reading Access Control Badges — Plain or Printed IDs?
Part of a wireless door opener, the receiver Doorhan DHRE-2 works, according to description, with the rolling code. It looks like the receiver can register a new keyfob by listening to its normal opening code:
2) To record the new code hold down for 3 sec the key «SW1» on the
recipient card, to make settings of the electric operator connected to the
output CH1 and the key «SW2» – to make settings of the electric operator
connected to the output CH2, at that the indicator LED1 will light. After
that press the necessary key on the remote control unit for 2-3 sec.
Attention! after the operation is completed only one key can be stored in the
memory of the recipient.
It is not necessary to, for example, hold both buttons at the same time to transmit the secret.
This doesn’t make sense to me. The receiver is supposed to be able to calculate next codes from last received code and some pre-shared secret, which is also stored on the keyfob. Does it learn the secret by listening to the normal open code, which is transmitted while you hold the open button for 3 seconds? Then why can’t a thief do that?
Continue reading Is it safe to learn new keyfob by its normal open code (rolling-code)?
I am theoretically thinking about automatically unlocking the house door via smart phone. Without the need to fiddle with the smart phone (opening an app, pressing a button).
There is a commercially available locking/unlocki… Continue reading Securely determine my smart phone’s position (in front of the door)
I am interested in setting up a trigger that can unlock door locks using an iPhone. The lock and unlock mechanism is not an issue as I have an API end point for this once authorized it is more an issue around the trigger.
I have seen that… Continue reading How secure is BLE for a door lock