首页
登录
职称英语
To fight against computer crimes, a computer system needs a sure way of iden
To fight against computer crimes, a computer system needs a sure way of iden
游客
2024-06-08
7
管理
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. [br] The most reliable and convenient identification method in present use is ______.
选项
A、signatures
B、photographs
C、fingerprints
D、magnetic stripes
答案
D
解析
推理题 第二段提到A项不可靠,第三段提到B项不可靠,第五段提到C项人们不愿采用,所以均可排除。
转载请注明原文地址:https://tihaiku.com/zcyy/3625537.html
相关试题推荐
[originaltext]W:Well,howareyoudoing?M:Fine.Thecomputersectioniscomi
Thecomputervirusisanoutcomeofthecomputerovergrowthinthe1980s.The
[audioFiles]audio_eusm_j01_155(20099)[/audioFiles]A、Sheisagainsttheman’spl
[originaltext]Atonetime,computerswereexpectedlargelytoremovethenee
【S1】[br]【S4】for→against句中的thegreens意为“环保主义者”,本句的意思是“环保主义者对……的反对削弱了。”所以应将for改为
[audioFiles]audio_eusm_j01_225(20099)[/audioFiles]A、Sheisagainsttheman’spl
Thereisnodoubtthat______(我们的教育体系令人不满意).oureducationalsystemleavessometh
[originaltext]TheAmericanpoliticalsystemhaslastedsincethe:thirteeno
[audioFiles]audio_eusm_j01_309(20099)[/audioFiles]A、Thesolarsystemisabits
Withtoday’sadvancementsincommunicationscombinedwithcomputersandhandh
随机试题
Thereismuchdiscussiontodayaboutwhethereconomicgrowthisdesirable.【T1】At
Cultureshockisapainfulexperiencewegothroughwhenweencountermanyn
AmericansEugeneFama,LarsPeterHansenandRobertShillerwontheNobelPr
请论述农业产业化龙头企业的作用。
Peoplehavespeculatedforcenturiesabo
批办公文时,主批人签注完毕,其他审批人画圈,应视为(??)A.同意 B.基本同
发生青霉素过敏性休克时,常最早出现的临床症状是A:烦躁不安,血压下降 B:四肢
根据《城镇老年人设施规划规范》,下列符合规定的是( )。A.老年人设施场地范围
公共行政是指()的管理活动。A.政府处理公共事务,提供公共服务 B.国务院
直角构件受F=150N,力偶M=Fa/2作用,a=50cm,θ=30°,则该力系
最新回复
(
0
)