Abstract：To solve the problem that the direct description of safety risk propagation was difficult in safety risk assessment, the small world networks theory was applied. The concepts of software safety risk, the characters and models of small world networks were introduced. The topology structure of software network was analyzed, and a dynamic model of risk propagation in the software components was established based on small world networks theory. According to this model, the result of risk propagation and the key factor for risk propagation were obtained. To demonstrate the performance gains of this model, an airplane software system was analyzed as an example. The results show that hazard severity is more important than hazard probability in terms of influence on the risk, and the risk deriving from a small degree node has faster spreading speed. The conclusion can be used to guide the software risk control and improve software safety.
刘学敏, 周经伦, 罗鹏程. 基于小世界网络的软件安全风险传播分析[J]. 江苏大学学报（自然科学版）, 2011, 32(1): 89-93.
LIU Xuemin, ZHOU Jinglun, LUO Pengcheng. Analysis of software safety risk propagation based on small world networks[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2011, 32(1): 89-93.
2011, Vol. 32 
