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Is anyone using a case to shield your keyfob from signal theft? Maybe this is overkill & unnecessary, but if you’re using something please post a link to the product. Thanks
C8 keyfobs go to sleep after they sit still for about 5 minutes. They won't transmit or receive any signal until someone picks up the fob and moves it around.
A faraday bag will block any signal, but in reality, the window a thief has to do any sort of a relay attack is really small before the fob goes to sleep.
C8 keyfobs go to sleep after they sit still for about 5 minutes. They won't transmit or receive any signal until someone picks up the fob and moves it around.
A faraday bag will block any signal, but in reality, the window a thief has to do any sort of a relay attack is really small before the fob goes to sleep.
C8 keyfobs go to sleep after they sit still for about 5 minutes. They won't transmit or receive any signal until someone picks up the fob and moves it around.
A faraday bag will block any signal, but in reality, the window a thief has to do any sort of a relay attack is really small before the fob goes to sleep.
In a post here a few months ago, I read 15 minutes before sleep. I have no way to verify that.
We keep our fobs for both cars in a recycled metal tin box that tea came in.
I put mine Faraday pouches when I get home. The spare FOB stays in one all the time. The FOB I use, I take it out when I leave the house and put it back in when I return.
In a post here a few months ago, I read 15 minutes before sleep. I have no way to verify that.
We keep our fobs for both cars in a recycled metal tin box that tea came in.
You can test it by locking your car and leaving the fob on a stool by the car door. After about 15 minutes you won't be able to open the door. If you pick up the fob and shake it you will be able to open the door.
At Spring Mountain they would leave the fobs in the cup holder. After a classroom session you sometimes you had to pick up the fob and shake it to start the car.
The OP beat me to it. I was going to post this LONG question asking how easy is it for a thief to take your vehicle using technology -
The wife and I did a ton of running around yesterday, and one place we stopped was at a medical store so I could look at some recliners since I have surgery coming up and I’ll be laid up for a couple of months. I pulled into the parking lot, you can see in the pic, pulled through a space facing out. That’s when I realized there was a guy behind me, and he pulled beside me and stopped. I’m use to people checking out the car but immediately looking to make sure no one was trying to carjack me. The guy was in a small, maybe 10-year-old POS that was hail-dinged to death, alone, and wasn’t even looking over. My wife and I were talking about how strange it was, given there were empty spaces EVERYWHERE. Realizing he was alone, I just sat there staring with a “you’re a dumbass for parking RIGHT next to me” look, but the guy never even glances at me, puts up his sun visor, and is just screwing around with this phone, I guess. We sat for a couple of minutes, and the guy never even glanced over. Finally, I say screw it, we get out of the car. I own a ranch, live to hunt and shoot, and I’m also carrying my concealed handgun under my shirt. I’m not going to just drive away because I’m 50 miles from home and not going to leave - I’m there for a reason. The parking lot is fairly busy, and it’s considerably busier than in the photo.
Long story long, we go to the store, I stood at the door for over a minute, and the guy never got out. About 10 minutes later, I have to go back to the car, and the guy is gone. I go back to the store, and about 20 minutes later, we leave, and we never saw the guy again.
My question is – after watching a clickbait YouTube video about Corvette theft being up “8,000%” since the C8 came out and how electronic devices are all the rage in car theft these days, is it possible that this guy had the ability to get the signal from my key fob and now has my address and ability to open the door and start my Vette (garaged kept so they have to break in)?
Oh, and on a side note, as we got about 10 steps away, my wife asked if I had disabled the pedal, so I got back in and locked the throttle with the Solar app.
This is an interesting post. I recently purchased a Vonetti Carbone Faraday Box for a newly purchased ERay on Amazon. My concern is not so much when the car is in the garage at home but when/if I'm out in public and someone is looking for an opportunity. The fraday box works, but unfortunately the ERay key fob won't fit into it with the fob cover that I currently have on it. So my wife has it for her Evoke, and it does work well when she's out shopping. I also have a fraday box at home just in case.
Thanks for all the information. I was hoping I wasnt being too paranoid about this. I never worried about this with the prior 4 Corvettes I’ve had. But after reading about all the thefts I started wondering if I should do something. In the meantime I have an old pouch from a NY EZpass that was supposed to stop an ez pass from transmitting. I guess I’m more concerned about when I am out vs when I’m home and the car is in the garage.
My question is it possible that this guy had the ability to get the signal from my key fob and now has my address and ability to open the door and start my Vette
Possible, yes. Perp would not get the address from the key fob, they would run your plate and get it from that or your insurance company. High value targets title the vehicle to an LLC and insure it that way so no home address associated with the vehicle. But with the Flock system of cameras where your car travels and is kept is way easier to figure out than it should be.
Since the C8 fobs (and most other modern vehicles) use rolling codes in theory the perp sitting next to you could have copied your code but it should only open the car the next time. Methodology is always shifting though. New vulnerabilities are found and patched via software updates.
Keeping the fob a long distance from the car at home isn't much of a barrier. An auto thief that has targeted your car will have long distance antenna on both transmitter and receiver. Those will be used to make car and fob think they are in proximity to one another and wake both, then unlock and start vehicle, then drive away. Still have to have a perp in the car to do the driving.
The car thieves have access to a not too expensive electronic device that will allow them access to your car without your fob. Kill switch or Soler Throttle Body with throttle lock is the best defense.
The car thieves have access to a not too expensive electronic device that will allow them access to your car without your fob. Kill switch or Soler Throttle Body with throttle lock is the best defense.
Yes! That is the item on my shopping list. It appears to be the best mechanism currently to slow or stop a thief. Regardless, it’s a car and I will never risk my life for it. It is replaceable.
The car thieves have access to a not too expensive electronic device that will allow them access to your car without your fob.
If you're referring to the Flipper Zero afaik it doesn't yet work on the GM system and it needs additional radios & firmware. But that could change at any time.
One annoying thing about those style attacks is they can throw your rolling codes out of sync. Meaning YOUR fobs would no longer work either, until they are re-synced with the car. Typically that means a dealer visit and if the car is stuck in your garage you'll have to tow it.
Last edited by Dads2kconvertible; Aug 25, 2025 at 09:20 AM.
I have this. When I got my C8 my other car got relegated to the driveway so I put the keys in this box (medium size). It works, I've put the keys in the box and carried it outside and I can't open the car doors by touching them, as I can when the keys are in my pocket.
Do I need it? Probably not but for the cost it can't hurt, and rather than having sets of keys sitting on the table the box looks nicer.
Keeping the fob a long distance from the car at home isn't much of a barrier. An auto thief that has targeted your car will have long distance antenna on both transmitter and receiver. Those will be used to make car and fob think they are in proximity to one another and wake both, then unlock and start vehicle, then drive away. Still have to have a perp in the car to do the driving.
Once the fob goes to sleep it can't be awakened electronically. It either needs to be shaken or a button pushed. But if you are walking around with it in your pocket then it will stay awake.
Box for the spares, pouch for when I travel. Probably overkill to have the pouch when I travel; more likely to get carjacked than someone at a car meet or the movie theater trying to clone my signal, and at that point the car is already running and they'll probably not leave without the key. I don't like to think that way, but crime is spreading out from Baltimore into the suburbs these days including stolen cars and carjackings, and nothing seems to be being done about it, things only seem to get worse. The pouch takes up a lot of room in my pocket especially wearing jeans so I may not bother anymore. I keep a spare battery in the pouch too, but by design, setting a dead fob in the cupholder lets you start the car so that's also overkill and I may stop carrying the pouch.
Interesting to hear about the fob going to sleep. That's good to know. But if you're walking around with the fob in your pocket, especially jogging, it sounds like that might count as the "shaking" for it to come awake... maybe not. My last car was a Hellcat Challenger and I don't think the damn thing even had tilt sensors. I'm used to having to compensate for security and not rely on any one method, and never assume anything is foolproof. Security for cars always interests me so I'm glad you started this discussion.
Keyfob antitheft protection?
