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
46
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://kaotiyun.com/show/aSOK777K
0
大学英语六级
相关试题推荐
A、12:15.B、1:00.C、1:10D、12:30.BW:Don’ttaketoolongatthesnackbar.It’saquarterafter12.M:It’sOK.Wehave45minut
TheMastersofBusinessAdministration(MBA,thebest-knownbusinessschoollabel,isanintroductiontogeneralmanagement.The
A、Artistsoftheworld.B、Artistsofthecountry.C、Studentswhostudyartorcomputer.D、Artistswhousecomputers.CWhomadem
Thereareabout105malesbornforevery100females,butthis(36)______dropstonearbalanceattheageofmaturity,andamon
Inthelate1960s’,manypeopleinNorthAmericaturnedtheirattentiontoenvironmentalproblems,andnewsteel-and-glassskysc
A、Theemployerandemployee.B、Theinterviewerandinterviewee.C、Theteacherandstudent.D、Thepoliceofficeranddriver.DWha
HarvardUniversity,breakingwithamajortrendincollegeadmissions,willeliminateitsearlyadmissionsprogramnextyear,wi
A、Heledanextravagantlifeinhislateryears.B、Hestillworkedhardwhenhebecamerich.C、HespenthislateryearsinAmeri
Theworldisrunningoutofoil,andenergyexpertsbelievethattherecouldbeseriousshortagesintenyears’time.Not
Humanbehaviorismostlyaproductoflearning____________________(然而,动物的行为主要是依靠本能).
随机试题
________hasbeenannouncedthatsomegraduateswillhostafairtoselltheirsecond-handbooksintheschoolhallthisSunday.
唯物辩证法认为,发展的实质是()
A、Takeitbacktothestore.B、Findthewarranty.C、Readinstructions.D、Callforhelp.D从“Didn’tahotlinenumbercomewithit?
与口腔黏膜病关系最密切的口腔微生物是
(共用备选答案)A.严禁直接口服B.禁用于红肿部位C.使用后不宜马上饮水D.一般应整片吞服E.保持舌下含服至少5分钟,仰卧姿势约20分钟透皮贴剂
《城市房地产抵押管理办法》,规定下列()情况不得设定抵押权。
施工期间交通导行方案设计是施工组织设计的()部分。
某高层商业综合楼地上共10层、地下共3层,建筑高度53.80m,总建筑面积67134.48m2。其中:地下部分建筑面积27922.30m2,使用性质为停车库及设备用房,共计停车415辆;地上部分建筑面积39215.18m2,地上1~5层使用性质为零售商业,
美术课程评价应以学生在美术学习中的客观事实为基础,注重评价与教学的协调统一,尤其要加强形成性评价和()。
A、 B、 C、 A本题是确认店主在假期里是否有什么特别计划的Be动词疑问句。
最新回复
(
0
)