Abstract:

In order to analyze and evaluate the risk of network security more reasonably, a cloudmodel based method for network security analysis was proposed. The main ideas, key technical and implementation steps of the method were given. The standard clouds were generated using improved backward cloud algorithm with unknown certainty. The improved algorithm with smaller deviation was also proved. Finally, Kddcup99 data set was used to simulate. The experimental results show that the proposed method retains the uncertainty of risk analysis. It provides a strong reference to adopt appropriate preventive measures.

Key words: network security;situation assessment;cloud model;fuzziness;randomness;credibility