WU Zhijun and SHI Zhen. Filtering LDoS Attack by FIR Filter[J]. Chinese Journal of Electronics, 2010, 19(2): 275-278.
Citation: WU Zhijun and SHI Zhen. Filtering LDoS Attack by FIR Filter[J]. Chinese Journal of Electronics, 2010, 19(2): 275-278.

Filtering LDoS Attack by FIR Filter

  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2010-04-05
  • Low-rate denial of service (LDoS) attack is
    a new class of DoS, which exploits TCP's congestion con-
    trol mechanism. LDoS attack can reduce the throughput of
    the attacked link by sending low-rate packets in the way of
    periodic pulse. Because of its low-rate characteristic, it can
    elude the monitor of traditional detection approach. Most
    applications in the Internet use TCP protocol, so the dam-
    age of LDoS attack is not inferior to the traditional °ood
    type DDoS attack. The characteristics of LDoS attack in
    frequency domain were analyzed, by adopting digital sig-
    nal processing technology. The ¯ltering algorithm was de-
    signed as a Finite impulse response (FIR) ¯lter to eliminate
    the illegitimate frequencies in frequency domain. Exper-
    iments result show that 92.88% of LDoS attack energy is
    ¯ltered, and 19.75% of normal energy is eliminated.
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