Network security field had gained research community attention in the last decade due to its growing importance.
This paper addresses directly one vital problem in that field is “Intrusion Detection System” (IDS). As much as many
researchers tackle this problem, many challenges arise while converting this research to reliable automatic system. The
biggest challenge is to make the system works with low false alarm with new unseen threats. In this paper, we address
this challenge by building a descriptive model using different models of deep Recurrent Neural Network (RNNs). (RNN)
models has the ability to generalize the knowledge that can be used to identify seen and unseen threats. This generalization
comes from RNN capabilities to define in its terms the normal behavior and the deviation accepted to be normal. Four
different models of RNN were tested on a benchmark dataset, NSL-KDD, which is a standard test dataset for network
intrusion. The proposed system showed superiority over other previously developed systems according to the standard
measurements: accuracy, recall, precision and f-measure.
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