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Jamming

Jamming is a wireless denial of service attack that disrupts communication between devices by overwhelming or interfering with the radio signals they rely on to stay connected. It can target any wireless technology, including Wi-Fi, Bluetooth, cellular, and GPS.

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About this video

Jamming is a denial of service attack carried out against wireless communications by deliberately introducing interference that degrades or destroys the signal connecting a device to its network. Wireless communication relies on electromagnetic waves transmitted between antennas, and when those waves are overwhelmed by a stronger, competing signal, the receiving device can no longer interpret the data being sent. The result is reduced connectivity or a complete loss of communication, effectively cutting the targeted device off from the network without any direct access to the device itself. The underlying principle is similar to wave interference in water, where multiple disturbances collide and disrupt one another rather than traveling cleanly to their destination. A jamming device exploits this same physics by broadcasting a signal loud enough to drown out legitimate transmissions in the surrounding area. Because this attack operates at the signal level, it is not limited to a single protocol or technology. Wi-Fi, Bluetooth, cellular, and GPS are all vulnerable, making jamming a significant concern across a wide range of environments, from enterprise wireless networks to critical navigation and communications infrastructure.

What you'll learn

Explain how wireless jamming functions as a denial-of-service attack by disrupting electromagnetic signal transmission between devices
Identify the types of wireless communications vulnerable to jamming attacks, including Wi-Fi, Bluetooth, cellular, and GPS

What's covered

Jamming Attack

What Is Jamming
- Overrides Wireless Signals
- Type of DoS Attack
- Degrades or Disconnects
How Wireless Works
- Antennas Send and Receive
- Electromagnetic Waves
- Wave Interference Analogy
  - Single Drop Clear Wave
  - Multiple Drops Cause Disruption
Affected Signal Types
- Wi-Fi and Bluetooth
- Cellular and GPS
- Any Airborne Signal
How Jamming Works
- Jamming Device Emits Signal
- Louder Than Target Signal
- Disrupts Device Connectivity

Key terms

Denial of Service: An attack that floods a system or network with traffic to make it unavailable to legitimate users.
Wireless Access Point: A device that allows wireless devices to connect to a wired network using Wi-Fi.
Jamming: A denial-of-service attack that disrupts wireless communication by transmitting interfering signals that degrade or block electromagnetic signal transmission between devices.
Electromagnetic Signal: A wave-based transmission medium used by wireless technologies such as Wi-Fi, Bluetooth, cellular, and GPS to transfer data through the air between devices.

Topics

Wireless Security Jamming Denial Of Service Wi Fi Bluetooth Gps Radio Frequency

Transcript

Jamming is a great example of what a denial of service attack looks like.

When a computer is connected wirelessly into a network, there are waves going back and forth between some sort of wireless access point and this computer, and that connection allows it to connect to the rest of the network wirelessly. Jamming attempts to override those signals, degrading that signal or disconnecting it altogether, creating a denial of service attack against those wireless devices.

How the waves behave

Wireless essentially has an antenna that sends data from one device, and the other device has an antenna that receives it, and vice versa. These waves go through the air, transferring a signal from one device to the other. Even though these waves are electromagnetic waves, they behave very similar to waves in water, even though those waves are mechanical waves. So we can study waves in water and understand how these wireless networks work.

If you have just a single drop of water, it creates this nice clear, clean wave that goes through the water. But once you start getting multiple drops in the water, they start interfering with each other and it causes disruption. That's essentially what jamming is: it's causing disruption in these waves, so that signals can't get passed back and forth.

This can be done with any kind of waves. So Wi-Fi, Bluetooth, cellular, GPS, really any waves that go through the air, we can disrupt those waves.

The attack card for jamming

Jamming is interfering with wireless signals.
It can be used on phones, GPS, Wi-Fi, Bluetooth, or any other wireless signals.
It's a type of denial of service attack.

So here we've got some sort of jamming device that sends out a signal, and it's loud enough that it interrupts the signal between these two devices. Therefore this device no longer has connectivity, or has very rough connectivity, to the rest of the network.

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