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Before performing an SSL data transfer, Both sides of the communication must first shake hands with SSL, The encryption algorithm has been negotiated to exchange the encryption key, Perform identity authentication, Normally, This SSl handshake process only needs to be performed once, But there is a Regegotiation option in the SSL protocol, It allows renegotiation of the secret key to create a new key, The attacker repeatedly carries out the key renegotiation process, and the key renegotiation process requires the server to invest 15 times more CPU computing resources than the client. In addition, even if the server does not support Renegotiation, the attacker can still create similar attack effects by opening a new SSL connection separately.This section is the foundation, I incarnate 100,000 why to ask the following questions! If the reader is clear, jump directly to the next section!Then, people will become lazier and lazier, and they will not want to move more and more, even if they used to love sports. And spend more and more time sleeping.　　然而，所有四面都是无情的，陶醉于仇恨和竞争的痛苦和快乐...或许，甚至爱情一个是刁蛮的明朝公主，一个是清朝深宫里的风流皇帝，一个是流放边疆的藩王之子。由他们撞击出来的友情火花，继而燃点出一个凄美的爱情故事，及一段崎岖的人生。Reporter: Everyone's reaction is what they think.Events are similar to triggers and are started when something happens. When a statement is started on the database, the trigger is started, and the event is started according to the scheduled event. Because they are similar to each other, events are also called temporary triggers.