摘要：Many organizations and service providers have started shifting from traditional server-cluster infrastructure to cloud-based infrastructure. The threat of Distributed Denial of Service (DDoS) attack continues to wreak havoc in these cloud infrastructures. In addition to DDoS attacks, a new form of attack known as Economic Denial of Sustainability (EDoS) attack has emerged in recent years. EDoS which is unique to cloud infrastructure may not be easily detected as with DDoS. Although EDoS attack is small at the moment, it is expected to grow in the near future in tandem with the growth in cloud usage. As EDoS has a major impact economically, it can considered to be more serious than DDoS and many defence and mitigation mechanisms have been proposed to combat these attacks. This paper introduces EDoS and how it differs from DDoS. The existing mitigation techniques are described and the drawbacks of these techniques are explained.
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