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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.　　一切看似从未发生，一切仿佛无人知晓。但这只是一系列恐怖事件的开始。此后不久，一种神秘致命病毒开始在濒临崩溃的医院内传播…咋跑这么大老远的来读书哩？你爹就放心你一个人出来？冰儿急忙道：老太太，有我照顾小姐呢。常言道：既来之，则安之，既然老天给了重生的机会，再世为人，一定要活出个精彩。于是，少年们就和少女就分开了，板栗还叮嘱了小葱几句话。住在“绿山墙农庄”的一对单身兄妹，马修和玛丽拉，因为年事渐高，想收养一个男孩帮忙农作。但是阴错阳差，孤儿院方面送来的竟是一个瘦小的红头发小孤女——安妮。这个脸上长满雀斑、有一头火红头发、活泼好动、爱说爱笑、爱幻想的少女，同马修兄妹那种沉稳拘谨的性格本来是格格不入的，但是安妮以她的天真和热情，最终征服了众人的心，不仅在绿山墙留了下来，还倍受大家的疼爱。马修兄妹的生活也渐渐变得充满活力与生机。Mathematics: