A Novel Real-Time DDoS Attack Detection Mechanism Based on MDRA Algorithm in Big Data

Algorithm 1

Algorithm for DDoS attack detection based on MDRA.

) Input a set of training data of normal network traffic records , where, .

() Extract the principal components of to reach 70% for the accumulative contribution rate based on PCA, and obtain the

    principal component data set .

() Calculate and of .

() Calculate the covariance matrices between the areas of every two triangles in .

() for to do

()  Input and

()  Calculate between and

()  Output

() end for

() Calculate by .

() Calculate by and .

() Input a fresh incoming traffic record .

() Reduce the dimensions of the features for  based on PCA, then get the records which include the principal components .

() Calculate of .

() Calculate between and .

() Input the threshold value .

() If then

()  return Normal

() else

()  return Attack

() end if