Thwarting DDoS attacks in grid using information divergence

► A DDoS can cause large-scale damage to resources and availability of the resources to genuine Grid users. ► This paper proposes a five-fold DDoS Defense Mechanism using an Information Divergence scheme. ► The proposed layered method gives the least percentage of false positives compared to other methods. ► The proposed method also gives better DDoS detection rate and lesser resource consumption rate.