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
考研
In computing, passwords are commonly used to limit access to official users. Yet the widespread use of passwords has serious dra
In computing, passwords are commonly used to limit access to official users. Yet the widespread use of passwords has serious dra
admin
2010-01-17
37
问题
In computing, passwords are commonly used to limit access to official users. Yet the widespread use of passwords has serious drawbacks. Office workers now have to remember an average of twelve system passwords. In theory they should use different passwords for each site, but in reality these would be impossible to remember, so many people use the same password for all.
An additional problem is that the majority use simple words such as "hello", or names of family members, instead of more secure combinations of numbers and letters, such as 6ANV76Y. This permits computer hackers to download dictionaries and quickly find the word that allows them access.
When system users forget their passwords there is extra expense in supplying new ones, while if people are forced to change passwords frequently they often write them down, making systems even less secure. Therefore, it is clear that the idea of passwords, which have been used as security devices for thousands of years, may need rethinking.
One possible alternative has been developed by the American firm Real User, and is called "passfaces". In order to access the system a worker has to select a series of photographs of faces from a randomly (随机地) generated sequence. If the pictures are selected in the correct order, access is granted. This concept depends on the human ability to recognize and remember a huge number of different faces, and the advantage is that such a sequence cannot be told to anyone or written down, so is more secure. It is claimed that the picture sequence, which used photographs of university students, is easier to remember than passwords, and it has now been adopted for the United States Senate.
What is the disadvantage of passwords as mentioned in Paragraph 1?
选项
A、They do not ensure security.
B、They are difficult to remember.
C、They have to be changed frequently.
D、They limit computer accessibility.
答案
B
解析
转载请注明原文地址:https://jikaoti.com/ti/UtpjFFFM
本试题收录于:
GCT工程硕士(英语)题库专业硕士分类
0
GCT工程硕士(英语)
专业硕士
相关试题推荐
简论社会主义政治文明建设的内容。
有下列情形之一者,得申请解释宪法:(1)中央或地方机关,于其行使职权,适用法律与命令发生有抵触宪法之疑义者;(2)人民、法人或政党于其宪法上所保障之权利,遭受不法侵害,经依法定程序提起诉讼,对于确定终局裁判所适用之法律或命令发生有抵触宪法之疑义者。这个条文
将国歌正式定为《义勇军进行曲》的修正案是()。
A、contractorganizationsB、realestatecompaniesC、individualpersonsD、specialconstructioncompaniesD广告第一栏说明的业务对象中提到了A,B,C,没有
Todaycognitivetheoristsempiricallystudytheimpactoffeelingsoncognitiveprocessessuchasmemoryandjudgmentandalsot
Intheimaginedworld______wouldrestrictchildren’swildestthoughts.Childrenarerulers______.
Hehasfancydreamsabouthislife,andnothingeverquite______hisexpectations.
TheXinhuabookstorechain,China’slargestofficialpublishingenterprise,hasbecomeasurprisingflashpointforinterestamo
随机试题
下列哪种情况下,可以提起行政复议,但不得提起行政诉讼?()
学校文化中最具决定作用的是行为方式。()
下列是吲哚洛尔的作用特点,其中哪项描述有错:
胃溃疡节律性疼痛的特点是()。
A.医疗机构配制的制剂B.中药C.中药饮片D.没有实施批准文号管理的中药材E.新发现和从国外引种的药材《中华人民共和国药品管理法》规定经国务院药品监督管理部门审核批准后,方可销售的是
银行汇票结算方式的特点有()。
会计法律关系是指会计机构和会计入员在办理会计事务过程中以及国家在管理会计工作过程中发生的各种经济关系。()
“备案号”栏:()。“经营单位”栏:()。
在中国大陆入境口岸的边检站只需出示有效证件,不必填写入境卡的是()。
A、 B、 C、 A
最新回复
(
0
)