Abstract: Decision for Autonomous System maliciousness has not been effectively resolved within the current inter-domain routing system．On the basis of the research on trust relationship via the human society networks,a model of decision for the Autonomous System maliciousness based on the quantitative trust measurement is proposed．Three criteria including direct decision,collaborative decision and degree of coordination are defined,on which the comprehensive analysis and quantization towards the interactive routing behaviors of target Autonomous System,and the degree of participation is also defined as the amplifying factor．Experiments based on simulation topology is launched and the result indicates that,under the typical circumstances of routes spoofing,services restriction and intended incorrect decision by collaborative Autonomous System,the model can effectively discriminate and make reasonable decisions to the target malicious behavior,with good accuracy and stability.

Key words: Inter-domain routing system,Autonomous system,Quantitative trust measurement,Maliciousness decision