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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.2017-07-22 15:41:20(12.20 update)网剧《云南虫谷》改编自天下霸唱小说《鬼吹灯之云南虫谷》，承接《龙岭迷窟》剧情，讲述了由胡八一（潘粤明 饰）、Shirley杨（张雨绮 饰）、王胖子（姜超 饰）组成的探险三人组查到传闻中救人性命的雮尘珠成为了古滇国献王墓的随葬品，特深入瘴疠之地探寻雮尘珠踪迹的故事。Mid-SeptemberWhen the server provides some UDP-based services, such as DNS, SMTP, NTP, etc., and finds some requests, in which the Response message is larger than the Request message, the Attacker sends a Request message that forges the source IP, and the source IP forges the IP address of the victim. After receiving the Request message, the server replies the "enlarged" Response message to the victim, thus realizing the amplification of traffic. The principle is roughly as follows: