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The attacker embezzled your identity and sent a malicious request in your name. The request is completely legal to the server, but it has completed an operation expected by the attacker, such as sending emails, sending messages, stealing your account number, adding system administrators, even purchasing goods, transferring virtual currency, etc.―为什么现在会想起呢？Launch of new products or functions: In essence, adding functions will open up new attack areas for attackers, which is conducive to their quick exploration. This is why it is necessary (but difficult) to provide zero-day defense when new products are released.郑家，青木爷仨忙了几天工夫，拟出详细的一份家财清册，并张家那些管家管事被抄的家财清单，都让黄豆送去书院。季木霖起身整了整衣服，低头看了眼沙发上滚落的水杯，以及咳嗽得全身颤抖的他：别碰我的底线，不然下次，我真的会拧掉你的脑袋。没准将来爹娘去了京城，还要借你的光呢。Observer mode: pay attention to encapsulating object notification, support the change of communication object, realize the change of object state, notify and update the objects that depend on it.