Abstract
Cyber security incident, such as data leak、system suspension, is one of the most significant risks to manage. Early detection and faster response to cyber security incidents are essential to limiting damages. In this article, we introduce a brief description of cyber-attack methods and how to respond as quickly as possible to incidents. For each company, taking all security measures by itself should be avoided, because investigation into non-core business increases. Instead, it is better to outsource some measures to providers. We introduce our cyber security service “NSSEINT" as an example of outsourcing services.