381–390 of 449 posts
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How does she unlock her front door?
I imagine a lot of people don't use a key to get in their house, nor do they use the front door. Hit the button on the garage door remote, drive in, walk into house.
I imagine improvements to the key fob could be made that would require a mechanical coupling with the car in order to start it. That would circumvent this attack.
I'm not sure if this is a joke about old keys being better, but I'd argue you could have the benefits of new keys and old keys combined if you just made it so that new keys have to be inserted into some compartment inside of cars, where they are authenticated by those cars. You can imagine a fob with a USB that has a different authentication code than the wireless one it sends out, and unless the USB is plugged into…
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> How does she unlock her front door? For many people, there's no need to unlock the front door because it's never locked. Having to lock your door just means you're living in a terrible neighborhood.
Growing up, we did not even have a key for our house. Lots of places around the US, there is no need for keys. It is really hard for some people to grasp the idea based on how and where they grew up. My wife grew up in a gang riddled area and will not abide unlocked doors if we are out and about.
Because of that, we had an additional safety feature, you couldn’t open the door from outside!
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How does she unlock her front door?
I imagine a lot of people don't use a key to get in their house, nor do they use the front door. Hit the button on the garage door remote, drive in, walk into house.
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Lock receives signal from Key, writes down time and picks a random key and uses these to create a ciphertext, encrypts that with the public key of Key to create a second ciphertext and sends. Key receives message, decrypts with private key to first ciphertext and encrypts that with the public key of Lock and sends back. Lock decrypts message with private key and earlier random key, compares to current time and if it…
This is basically the solution. Light travels about 1 foot in one nanosecond, so the car needs to reject latent replies. I did research in this area a few years ago. Here's a research paper [1] from 1993 that goes into more detail about this type of "distance bounding" solution (i.e. authenticating received signal only if 1) it is received within a few nanoseconds AND 2) the decrypted received signal contains the pre…
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You can turn off keyless-go by double pressing the close button. The LED on the key will light up (short - long) as a confirmation.
Ha, that’s an interesting one! I am sure I’ve done that by accident given how unreliable i find pulling the handle to be.
And it‘s only disabled temporarily. As soon as you press any button on the key again (e.g. open the car), keyless-go will be activated again.
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Mine too! But only because the battery on my fob died and I am too poor now to replace it. Frankly I kinda like it that way, it makes me more conscious or the damn fob (I used to just drop it anywhere in the car).I have a Tucson 2011 FWIW
The battery is like $1 on eBay
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My Tesla requires a pin to drive like a phone
That was rolled out in a recent update, right? I think the over-the-air updates is one of the big advantages that Tesla has right now. They can respond quickly to critical vulnerabilities like that. I wonder how fast other car manufacturers are going to catch up? Volvo recently announced that they are working on an Android based system, but it's not going to be rolled out before 2020.
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I'm not sure if this is a joke about old keys being better, but I'd argue you could have the benefits of new keys and old keys combined if you just made it so that new keys have to be inserted into some compartment inside of cars, where they are authenticated by those cars. You can imagine a fob with a USB that has a different authentication code than the wireless one it sends out, and unless the USB is plugged into…
Toyota Prius does that. (Or at least the 2007 version did) You have the key fob (with emergency key inside). You have to insert the whole fob into a port on the dashboard for it to start.
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It is a convenience feature -- you don't have to fish your keys out of your pocket/handbag and press a button to unlock your car doors or to start the car. So long as you have the key somewhere on you (bag/handbag/pocket), you can unlock and start the car.
Is getting your keys out of your bag or pocket really that hard? In comparison to the security risks? To think of it another way: before keyless entry was a thing - how many people were thinking 'damn I wish I didn't have to get these annoying keys out of my pocket?' To think of it yet another way: How many people buy the upgraded trim on their car mainly for the keyless entry? (Not having a go - genuinely curious)
I used to have a car without this feature and it was sort of annoying for 5 seconds each time I have to unlock the car. I do get annoyed when I get a rental without this feature too.
Additionally, this also helps when I am carrying bags or other large items with two hands. I can simply make a kicking motion at the bottom bumper of my car and the trunk will open automatically instead of me having to put the bags down and fish for my keys.
I agree that it is minor and not a real deal-breaker, but it is a nice to have.