The Computer Virus 计算机病毒,,How do viruses spread?,,计算机病毒定义 computer virus definition,,All that can cause computer fault, destruction of computer data and program collectively referred to as a computer virus. 破坏计算机功能或者毁坏数据，影响计算机使用，并能自我复制的一组计算机指令或者程序代码 中华人民共和国计算机信息系统安全保护条例第二十八条,,MYDOOM, 电邮蠕虫病毒,,PHISHING 网络钓鱼,,灰鸽子Gray pigeons,,What is a computer virus?,A computer virus is a program designed to spread itself by first infecting executable files or the system areas of hard and floppy disks and then making copies of itself. （计算机病毒是通过首次感染可执行文件或者系统硬盘和软盘系统区域，进行传播，并且能够自我复制的程序代码）,,Common virus,,Virus classification,木马病毒 Trojan 蠕虫病毒 Worm 后门病毒 Backdoor 脚本病毒 Script 宏病毒 Macro 系统病毒 Win32、PE 捆绑机病毒 Binder 下载者病毒 downloader,好多种,,How do viruses spread?,over execute program,,,over a network.,网页要求安装 外挂程序,,,over flash memory,电脑插上受病毒感染的U盘后，主机本身也会跟著中毒,,The spread of the virus through the Internet speed,One day... ...,,What do viruses do to computers?,damage files interfere with your computers operation try to spread themselves around.,,Effect of computer virus,,Do not melt down your CPU Do not burn out your hard drive Do not cause your monitor to explode,Note that viruses cant do any damage to hardware:,,Some general tips on avoiding virus infection,To data important files backup Install anti-virus software scanning for viruses on a regular basis,,If you want to protect your computer,Use Antivirus Software！,,Some antivirus softwares,,,Last，Let me introduce the Hacker Of couse ，not the movie,,They are hackers,夜间活动频繁职业,,In the computer security context, a hacker is someone who seeks and exploits weaknesses in a computer system or computer network. Hackers may be motivated by a multitude of reasons, such as profit, protest, or challenge.,,*黑客（Hacker）,,While other uses of the word hacker exist that are not related to computer security, such as referring to someone with an advanced understanding of computers and computer networks, they are rarely used in mainstream context.,,,I think,,,This is all thank you,If you dont clap hands, tonight your computer is poisoning,,,鼓掌，否则今晚电脑中毒,。