三三理论

In order to use SYN? Cookies to calculate the SYN-ACK serial number (that is, SYN? Cookies), the host must first combine some local password bits, a data structure including IP address and TCP port number, SYN initial sequence number, and some index data identifying the password bits. An MD5 digest is generated on top of all the above bytes, and then some bits are truncated from the hash value to put it into the SYN-ACK sequence number. Since the size of the sequence number is about a quarter of the total hash value, this truncation is necessary, but usually at least 3 bytes of hash bits are used for verification, which means that there are still nearly 2 24 possibilities to guess and verify cookies without knowing the password bits. In order to send out the hash value, some bits of cookies will reduce the upper limit value of MSS (Maximum Segment Length) contained in SYN and affect the index bits that identify the native password bits in the hash value.国术，只杀敌，不表演的武术。B. Women: Individual (70m) and Team (70m) in the knockout stages of the Olympics.苏颜（黄姵嘉 饰）是一个看似活泼开朗，但其实内心有些自卑的女生，因不愿敞开心扉，曾经和家人、朋友发生了很多误会与矛盾，在男友陆瑾瑜（陈玺安 饰）的关爱和照顾下，在结婚前夕她决定以邮件的方式向亲朋好友吐露心声，揭开所有隐藏的真相，这封密码信也开启了他们对曾经那段青春往事的回忆，然而一场车祸却在此时不期而至……正是此时，浙江司一位小官送来了这样一份大礼。There are also such ~在阳光下身影镀着与这个小镇同样的金色，亲密得没有间隙。想起曾经自己也和一个男孩这么的亲密，她想自己是不是太胆小了。在一个广场上传来了一首小提琴曲路非一眼就看到了辛辰，辛辰轻声说我爱你，路非。