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仗着喜姑姑的势，把你显摆的。Elevator Propulsion Up Arrow Up Arrow-姐姐瞳早上出门说是要去旅行，数小时后，却传来瞳撞上电车横死的噩耗，面对面前的无头尸，弟弟克也无法相信这是真的，他决定外出追寻姐姐的踪迹。（稲垣五郎、桜井幸子饰）Traditional security is a constant stack of security devices, security products, Later, in order to make better use of these secure infrastructure resources, Defence-in-depth emerged, Take the layer as an example, Layer by layer, Defense from the outside to the inside, However, security problems emerge one after another. It also shows that this still cannot well ensure the safety of the organization. Safety is a growing problem, which cannot be solved by one-time deployment. Safety problems not only come from external and internal damages, but also are not rare intentionally or unintentionally. Therefore, the focus should be on sparse, starting from three aspects: detection, emergency response and process.