Literature Database Entry


Fabian Missbrenner, "Improving the Effectiveness of Reactive Jamming with Off-the-shelf WiFi Devices," Bachelor Thesis, Department of Computer Science, Paderborn University, September 2017. (Advisors: Bastian Bloessl and Florian Klingler)


Many portable electronic devices rely on a stable connection to a wireless network. A stable connection is endangered in the presence of so-called jammers. Jammers intentionally interfere with the wireless communication of other devices. Learning about the limitations of jamming allows for protection against malicious jamming as well as for improvement of good-natured jamming. Recently, it was found that jamming is possible not only with the help of expensive radio equipment but also with cheap off-the-shelf USB WLAN dongles. It is even possible to target only selected communication in a network, which is called reactive jamming. I use an off-the-shelf device as a jammer to investigate the effectiveness of reactive jamming on two receivers. In order to evaluate the impact of various jamming parameters, I perform experiments. In the experiments, an artificial communication of a sender and a receiver is damaged with a reactive jammer. My experiments show that when the jammer’s signal strength reaches a level similar to that of the sender, it can reliably disrupt the communication. Furthermore, my results indicate that jamming effectiveness is dependent on the jam frame’s physical layer. In case of the used jammer, Orthogonal Frequency Division Multiplexing (OFDM) appears to be twice as harmful as Complementary Code Keying (CCK) both on two very diverse receivers. If this indication can be validated, the error models of simulators should be adapted to reflect the impact of the physical layer.Moreover, I use the jammer to test features of the receiver and find that the Wistron NeWeb DCMA-82 receiver supports a Message in Message (MiM) mode. MiM allows the jammer to reliably capture this receiver, if the jammer’s signal strength exceeds that of the sender by more than 12 dB.

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Fabian Missbrenner

BibTeX reference

    author = {Missbrenner, Fabian},
    advisor = {Bloessl, Bastian and Klingler, Florian},
    title = {{Improving the Effectiveness of Reactive Jamming with Off-the-shelf WiFi Devices}},
    institution = {Department of Computer Science},
    year = {2017},
    month = {September},
    school = {Paderborn University},
    type = {Bachelor Thesis},

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