Hacking
people tend to think of computers as isolated machines,working away all by themselves.some do-personal computer without an outside link,like someones hideaway (隐蔽的) cabin in the woods.but just as most of homes are tied to a community by streets,bus routes and electric lines,computers that exchange intelligence are part of a community m local,national and even global network joined by telephone connections.
the computer network is a creation of the electric age,but it is based on old-fashioned trust.it cannot work without trust.a rogue loose (为所欲为的无赖) in a computer system called hacker (黑客) is worse than a thief entering your house.he could go through anyones electronic mail or add to,change,distort or delete anything in the information stored in the computers memory.he could even take control of the entire system by placing his own instructions in the software that runs it.he could shut the computer down whenever he wished,and no one could stop him.then he could program the computer to erase any sign of his ever having been there.
hacking,our electronic-age term for computer break-in,is more and more in the news-brainy kids vandalizing university records,even pranking (胡闹) about in supposedly safeguarded systems.to those who understand how computer networks are increasingly regulating life in the late 20th century,these are not laughing matters.a potential for disaster is building: a dissatisfied former insurance-company employee wipes out information from payroll (工资表) files.a student sends out a virus,a secret and destructive command,over a national network.the virus copies itself at lightning speed,jamming the entire network thousands of academic,commercial and government computer systems.such disastrous cases have already occurred.now exists the possibility of terrorism by computer.spoiling a system responsible for air-traffic control at a busy airport,or knocking out the telephones of a major city,is a relatively easy way to spread panic.yet neither business nor government has done enough to toughen its defenses against attack.for one thing,such defenses are expensive; for another,they may interrupt communication the main reason for using computers in the first place.
精选英语美文阅读:无雨的梅雨天 (双语)
浪漫英文情书精选:Need You With Me需要你爱我
浪漫英文情书精选:Is It Love?这是爱么?
浪漫英文情书精选:My Love Will Reach Any Distance爱无边
精选英语美文阅读:木鱼声声
美文阅读:青春物语
精选英语美文阅读:哪有一株忘忧草? (双语)
爱情英语十句
精选英语美文阅读:你见或者不见我(中英对照)
精选英语美文阅读:A Friend's Prayer 朋友的祈祷
伤感美文:人生若只如初见
浪漫英文情书精选:The Best Surprise最好的惊喜
双语美文:What are you still waiting for?
献给女性:如果生命可以重来
英语美文:A Psalm of Life 人生礼颂
精选英语美文阅读:爱他就把他留下来 (双语)
双语美文欣赏:孤独人生
精选英文情诗:请允许我成为你的夏季
浪漫英文情书精选:Boundless Love无边的爱
双语美文:在思考中成长
精美散文:27岁的人生
精选英语美文阅读:假如生活欺骗了你
如果生命可以重来(双语)
美文:爱的奇迹
啊,我讨厌英语 Gullia Oops Jaime Pas Langlais 这首歌是不是也唱出你的心声了
精美散文:爱你所做 做你所爱
幸福的秘诀:简单的生活很幸福
双语美文:I Wish I Could believe
浪漫英文情书精选:To Prince Perfect献给心中的王子
浪漫英文情书精选:I'll Be Waiting我会等你
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |