2-3 A Development of Experimental Environments "SIOS" and "VM Nebula" for Reproducing Internet Security Incidents MIWA Shinsuke and OHNO Hiroyuki Security incidents are growing significantly on a daily basis in the Internet world causing considerable damage. To protect against these incidents, some protection mechanisms or softwares has come to be used. Each time a new attacking method or virus or worm appears, it must be analyzed in detail since such protection mechanism or software requires detailed information on that. However, these incidents are sophisticated because enlarged its scale and supervened incidents cause many interactions, make it difficult to acquire such in-depth information. To analyze sophisticated incidents, we developed experimental environments for reproducing Internet security incidents. In this paper, we report on the development of our reproducing environments called "SIOS" and "VM Nebula". Internet, Security, Security incident, Experimental environment, Incident reproducing 21
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