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.
为什么现代恋情大多以失败告终?
国内英语资讯:China Focus: Lis visit to Bulgaria, Germany to promote pragmatic cooperation
不动产登记平台实现全国联网
国内英语资讯:Chinese premier stresses cutting red tape, improving services
马克龙欲重启国民兵役制度 要求所有16岁法国公民强制服役
这个比赛可能适合心情压抑的人们
体坛英语资讯:Spain beats Italy 67-60 to enter FIBA WC quarterfinal
银幕情缘:这些明星情侣相识在片场
壮丽70年:“中国速度”的演变
国内英语资讯:Internet Plus Agriculture model to promote integrated rural development
这10个诡异的英语习语你知道吗?
国内英语资讯:Chinese, Guinean presidents exchange congratulations on 60th anniversary of diplomatic ties
Entertainment, amusement, recreation 和 pastime 四个表示“娱乐”的名词
18个美容行业不希望你知道的秘密
河北省辛集中学2017-2018学年高二下学期第二次阶段考试英语试卷
体坛英语资讯:Argentina crushes Venezuela to reach FIBA World Cup quarterfinals (updated)
子曰:英语里的孔子鸡汤,都不是我说的!
The continued appeal of online shopping 网上购物热潮继续增温
战胜懒惰的12大方法
国内英语资讯:Senior Chinese officials meet with U.S. Secretary of Defense
一周热词榜(6.23-29)
俄罗斯科学家研制出人参巧克力
国内英语资讯:Regional countries should be vigilant against interference in South China Sea: spokesperson
合适的才是最好的
这么多年,你真的会洗手吗?来看看怎么样洗手才正确
国内英语资讯:MoU signed for China-Nepal Friendship Industrial Park in eastern Nepal
国内英语资讯:Xi meets with U.S. Secretary of Defense
如何礼貌而坚决地拒绝别人
国内英语资讯:China shares its strategy in winning war against poverty with ASEAN
国内英语资讯:Economic Watch: Foreign investors show strong appetite for Chinese market
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |