首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
To fight against computer crimes, a computer system needs a sure way of identifying its right users and rejecting those who are
To fight against computer crimes, a computer system needs a sure way of identifying its right users and rejecting those who are
admin
2010-05-09
26
问题
To fight against computer crimes, a computer system needs a sure way of identifying its right users and rejecting those who are not entitled to use it. The identification system should be quick, simple, and convenient.
At present, signatures are widely used to identify credit card holders, but it takes an expert to detect a good forgery. Sometimes even a human expert is fooled, and there is no reason to believe that a computer could do any better.
Photographs are also sometimes used for identification. But, people find it inconvenient to stop by a credit-card company and to be photographed. Companies might lose business if they made the pictures under absolute requirement. Also, photographs are less useful these days, when people frequently change their appearance by changing the way they wear their hair. Finally, computer programs for analyzing photographs are still highly experimental.
Cash-drawing systems often use two identification numbers: One is recorded on a magnetic stripe on the identification cards, and the other is given to the CRS holder. When the user inserts his card into the cash-drawing terminal, he keys in the identification number he has been given. The computer checks to see that the number recorded on the card and the other keyed in by the user refer to the same person.
For a long time, fingerprints have provided a method of positive identification. But they suffer from two problems. One is that there is no simple system for comparing fingerprints electronically, the other is that because most people associate being fingerprinted with being arrested; they almost surely would resist being fingerprinted for routine identification.
Voiceprints have been suggested. With these, the user has only to speak a few words for the computer to analyze his voice. There are no psychological problems here. And technically it’s easier to take and analyze voiceprints than fingerprints. However, it has yet to be proved that the computer cannot be fooled by imitation. Also, the voice is subjected to the noise and distortion of a telephone line.
Even lipprints have been suggested. But it’s doubtful that kissing computers will ever catch on.
If the technical problems can be worked out, which method is the most promising?
选项
A、Voiceprints.
B、Fingerprints.
C、Photographs.
D、Signatures.
答案
A
解析
推理题 文章说明了选项B、C、D所代表的三种方法都存在问题。虽然A项也存在技术问题,但文章列举了它的不少好处。
转载请注明原文地址:https://jikaoti.com/ti/UCYMFFFM
0
大学英语六级
相关试题推荐
Wemodempeopleeatnotonlywhenwearehungrybutalsowhenweareinbadmood.Itisnecessaryforustoknowhealthyweight
A、Itcancausefloodingannually.B、Itcancarrydiseasesthataffectanimals.C、Itcanintroducetoomuchsaltintothesoil.D
A、Freedomfromthestressofworking.B、Freedomfromsocialregulations.C、Freedomfromlaws.D、Freedomfromstudy.AWhatfreedo
A、Doctorandpatient.B、Policemanandcardriver.C、Librarianandstudent.D、Postclerkandcustomer.BW:IsupposeIwasgoing
A、Hehasafeelingofinsecurity.B、Heismissinghisfamily.C、Helacksself-confidence.D、Hefeelsiii.BWhatdoesitprobably
A、Thetwospeakerswillcontinuetalkingandbecomefriends.B、Thetwospeakerswillspendtheirvacationtogether.C、Thewoman
A、ItwasborninNewYork.B、Itisakindofmusicasastyleofplaying.C、Hearingjazz,peoplewanttodancetothemusic.D、I
A、Trainers.B、Clowns.C、Acrobats.D、Magicians.AWhichofthcfollowingperformerscannotbefoundinCirqueduSoleil?信息明示题。女士说
A、Jogging.B、Tennis.C、Cycling.D、Swimming.BWhichsportwascitedasthethirdmostpopular?综合推断题。男士指出,在体育运动上表现最为活跃的两组人最喜欢的
A、Sendingthenextpackageearlier.B、Waitingpatiently.C、Usingairfreight.D、Lookingforthepackage.C判断推理题。男士说10天前寄的包裹到现在都
随机试题
PASSAGETHREE(1)VaststretchesofcentralAsiafeeleerilyuninhabited.Flyat30,000feetoverthesouthernpartoftheform
要素组合的创新主要是从()分析了人、机、料各种结合方式的改进和更新。
WhentheEgyptiansadoptedtheseven-dayweek,theynamedthedaysafterfiveplanets,thesunandthemoon.
以下关于国际买卖合同中说法错误的是()。
甲乙双方签订一份买卖合同,丙方向甲方提供合同的担保,履行过程中,甲乙双方通过协商对合同作了重要变更,但甲方未将变更事项通知丙方。合同履行了部分后,甲方的严重违约行为导致与乙方解除合同。则对变更事项中损失部分的处理原则是( )。
根据《记分考核管理办法》的规定,下列属于一次记分分值为1分的情形包括______。
为上级机关提供决策参考或提出一些具体的设想和办法,属于()意见。
已知等比数列{an}的公比为正数,且a3a9=2a52,a2=1,则a1=
存储一个国际码需要几个字节?
SharonhadreceivedatelegramfromtheQueentocongratulateheronreachingher100thbirthday.Sharon’ssisters,Marjorieand
最新回复
(
0
)