Abstract: The cloud computing technology which is a new Internet based super-computing model has aroused great concern,facing an increasing number of security threats at the same time. This paper built a intrusion detection system framework which is adapt to the cloud computing environment proposed in this paper. The nonlinear manifold learning algorithm was introduced to the model proposed in this thesis to be the core algorithm of the data pre-processing module, and the improved I_I_E algorithm was given in order to improve the classification performance. I}he simulation result shows that the algorithm is effective and efficient.

Key words: Cloud computing, Intrusion detection, Manifold learning