文档介绍：Computer Viruses 计算机病毒英语谚语一则 Do well and have well. 善有善报。英语知识小点滴艾滋病(获得性免疫缺陷综合征) AIDS (Acquired Immune Deficiency Syndrome) 课前小知识 puter virus is an e of the computer overgrowth in the 1980s. The cause of the term “ computer virus ” is the likeness between the biological virus and the evil program infected with computers. 计算机病毒是 20世纪 80年代计算机飞速发展的产物。“计算机病毒”这一名词起因于计算机上传染的有害程序与生物学中病毒的相似性。病毒结果繁茂,生长过渡生物(学)的 The origin of this term came from an American science fiction “ The adolescence of P-1 ” written by Thomas J. Ryan, published in 1977. 该名词最早出现于美国作家该名词最早出现于美国作家 Thomas J. Ryan Thomas J. Ryan 于于1977 1977 年发表的科幻小说年发表的科幻小说““P-1 P-1 的青春期的青春期””。。科幻小说青春期 Human Viruses invade a living cell and turn it into a factory for manufacturing viruses. However, computer viruses are small programs. They replicate themselves and attach their copies to another program. 人体病毒侵入生命细胞并将其变为病毒的人体病毒侵入生命细胞并将其变为病毒的““生生产工厂产工厂””。然而,计算机病毒则是一些小的程序, 。然而,计算机病毒则是一些小的程序, 它们可以自我复制并将其粘贴于其它程序之中。它们可以自我复制并将其粘贴于其它程序之中。复制 Once attached to the host program , the viruses then look for other programs to “ infect ”. In this way, the virus can speed quickly throughout a hard disk, or an anization when it infects a LAN or a multi- user system . 只要一粘附于宿主程序,病毒就会寻找其它只要一粘附于宿主程序,病毒就会寻找其它的程序将其感染。通过这种方式,当一个局域网的程序将其感染。通过这种方式,当一个局域网或一个多用户系统受到感染之后,计算机病毒会或一个多用户系统受到感染之后,计算机病毒会迅速扩散到整个硬盘甚至整个组织。迅速扩散到整个硬盘甚至整个组织。宿主程序 Local work 多用户系统 At some point, determined by how the virus was programmed, the virus attacks . The timing of the attack can be linked to a number of situations, including a certain time or date, the presence of a particular file, the security privilege level of the user, and the number of times a file is used. 病毒程序的设计决定了它们只有在某个点上病毒程序的设计决定了它们只有在某个点上才会发作。发作的时间选择通常与一些环境条件才会发作。发作的时间选择通常与一些环境条件有关,如确定的时间或日期,某个特定文件的存有关,如确定的时间或日期,某个特定文件的存在,使用者的安全优先等级或文件被使用的次数在,使用者的安全优先等级或文件被使用的次数等。等。发作,攻击特权 Likewise , the mode of attack varies. So-called “ benign ” v