Arduino-Car-Key-Jammer 🔑

❗ For Educational And Informational Purposes Only ❗

Support me

• BTC : bc1qewn4exq2clynkf8gdu446d6kx2xyq8ltcuv569
• ETH : 0xc7B62ae9aCA9687B0CCD280c33CFD9951801d829
• XMR : 475vC4AnXp4SWcM5yesBMySBjbr7E2EPC4u4eVDzM1fsH4PmpcRofamEQwNUzBWfHoS1ocMXncBTRg91pNvcnFwC8dQkp3J
• RVN : RSdg7TnFZMLLKwdoCXMKMKVcSn3ZRDiTFp
• LTC : LMihbSPVpDPLEj1EvFAc65wfY8vHUWoPVF

What is that ???

This is a small project about an RF module for an Arduino. This module can transmit at 433 MHz, which can be used to jam or disable a car key. This project is for educational and informational purposes only. In some countries, it is illegal to block a signal. I assume no liability for any damage.

Does it work ❓

Yes, it works, but not for every car, and 433 MHz is used in Europe, not in the USA (for the USA, it is 315 MHz or 868 & 915 MHz).

What is a roll jam

A roll jam is a type of jamming attack that targets wireless communication devices, such as those that use radio frequency (RF) signals to transmit and receive data. > It works by exploiting the vulnerability of some wireless devices that use a "rolling code" algorithm to prevent replay attacks. In a rolling code system, the transmitter and the receiver use a synchronized algorithm to generate and exchange a new code for each transmission. The code is derived >from a secret key and a counter, and it changes each time a new transmission is made. This makes it difficult for an attacker to capture and replay a code, as the >same code will not work for the next transmission. However, a roll jam attack can disrupt this process by interfering with the transmission of the first code sent by the transmitter. The attacker uses a jamming device >to transmit a strong signal on the same frequency as the original transmission, causing the receiver to miss the code. The attacker then quickly transmits a new code >to the receiver, which the receiver accepts as valid. The attacker can then capture the first code and use it later to replay the original transmission. The reason this attack works is that the rolling code algorithm assumes that each transmission will be successful, and it does not have a mechanism to detect or >recover from failed transmissions. Therefore, if the first transmission is missed, the system assumes that it was a temporary glitch and accepts the next code sent by >the attacker. In summary, a roll jam attack works by disrupting the synchronization between the transmitter and the receiver in a rolling code system, and exploiting the >vulnerability of the system to replay attacks.

SDR Data 📶

The attack mode on this picture is mode 4 (Fake data).

Modes

• ✅ High Power Jammer
• ✅ High freq puls
• ✅ Low freq puls
• ✅ Fake Data
• ✅ Fake Data 2

How to use

You can connect via the serial port at a baud rate of '9600'. Once you've done this, you can type the number '0' and send it. If everything works, you will get the following text back: '1 / High Power Jammer | 2 / High Freq Puls | 3 / Low Freq Puls | 4 / Fake Data | 5 / Fake Data 2'. Then you can choose a number to stop the jamming. To stop the jamming, you need to press the reset button on your Arduino/chip.

What arduino do i need ?

You can use every Arduino. I used an LGT8F328. This is a cheap copy of an Arduino Nano.

What is the range ?

I tested it at 50m distance

If you make a video of this or a block post please link my github

❗ It's important to be aware of the legality of jamming signals in your region before using or building such a device. ❗