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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.2. The number of domestic reflection servers used to launch NTP reflection attacks this month is the top three provinces in terms of province statistics: Henan Province, Beijing City and Hebei Province. The largest number of home operators is Unicom. According to the statistics of the number of forwarding attacks, the routers with the largest number belong to Liaoning Telecom, Zhejiang Telecom and Zhejiang Unicom.诸位请先行一步，本宫有几句话想跟王翰林说。不过我们已经和汉王联系，齐国即便是败了也不打紧。In TCP/IP protocol, TCP protocol provides reliable connection service and uses three-way handshake to establish a connection.New variable name: JAVA_HOMEAction: Blow a kiss.