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Questions tagged [locks]

Use for questions about the security of physical locks, as opposed to e.g. write locks on a database.

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51 votes
1 answer
16k views

Vehicle remote key security

How secure are car remote keys? When you lock or unlock your car, can someone spoof or make another remote key? How do car remote keys work? Do they use some kind of private/public keys, encryption? ...
Guntis's user avatar
  • 745
154 votes
3 answers
24k views

Does pressing a car remote many times offer denial of service attack for rolling codes?

My understanding of remote car key fobs, and similar security devices with rolling codes, is that the key device is a transmitter that, each time the button is pressed, sends the next secret in a ...
Oddthinking's user avatar
  • 1,849
18 votes
1 answer
7k views

How do rolling code fobs and receivers synchronise?

This is a follow-up question to my earlier one: Does pressing a car remote many times offer denial of service attack for rolling codes? I want to emphasize that I am asking this question more to shore ...
Oddthinking's user avatar
  • 1,849
15 votes
3 answers
60k views

How many unique house keys can possibly exist?

A Yahoo! answers user suggested that there are 5^5 possible unique configurations for a physical key, but the answer wasn't sourced. I wondered if anyone had similar numbers for how many possible key ...
Lou's user avatar
  • 315
-1 votes
5 answers
3k views

Why do most cars use physical keys and no PIN?

Why do car makers rely on physical start keys, which can be stolen by home burglars and then used to start the vehicle? Why don't they use more secure methods such as a personal PIN, or a pin code to ...
Christian's user avatar
  • 265