CSIRTs operate independently in various ways depending on the purpose of the CSIRT, its position within an organization, activities, and legal restrictions. However, since attacks involving computer security are becoming more complex and skillful, it is increasingly diffi cult for an individual CSIRT to deal with them promptly. Therefore, the Nippon Computer Security Incident Response Team Association (Nippon CSIRT Association) was established so that those CSIRTs in similar situations or with similar challenges can cooperate to solve them mutually. The aim in establishing the association is to foster cooperation and close, trustworthy relationships between CSIRTs in order to facilitate prompt, appropriate response
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