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
Passwords are everywhere in computer security. All too often, they are also ineffective. A good password has to be both easy to
Passwords are everywhere in computer security. All too often, they are also ineffective. A good password has to be both easy to
admin
2022-03-03
50
问题
Passwords are everywhere in computer security. All too often, they are also ineffective. A good password has to be both easy to remember and hard to guess, but in practice people seem to pay attention to the former. Names of wives, husbands and children are popular. "123456" or "12345" are also common choices.
That predictability lets security researchers (and hackers) create dictionaries which list common passwords, useful to those seeking to break in. But although researchers know that passwords are insecure, working out just how insecure has been difficult. Many studies have only small samples to work on.
However, with the co-operation of Yahoo!, Joseph Bonneau of Cambridge University obtained the biggest sample to date—70 million passwords that came with useful data about their owners.
Mr Bonneau found some interesting variations. Older users had better passwords than young ones. People whose preferred language was Korean or German chose the most secure passwords; those who spoke Indonesian the least. Passwords designed to hide sensitive information such as credit-card numbers were only slightly more secure than those protecting less important things, like access to games. "Nag screens" that told users they had chosen a weak password made virtually no difference. And users whose accounts had been hacked in the past did not make more secure choices than those who had never been hacked.
But it is the broader analysis of the sample that is of most interest to security researchers. For, despite their differences, the 70 million users were still predictable enough that a generic password dictionary was effective against both the entire sample and any slice of it. Mr Bonneau is blunt: "An attacker who can manage ten guesses per account will
compromise
around 1% of accounts. " And that is a worthwhile outcome for a hacker.
One obvious solution would be for sites to limit the number of guesses that can be made before access is blocked. Yet whereas the biggest sites, such as Google and Microsoft, do take such measures , many do not. The reasons of their not doing so are various. So it’s time for users to consider the alternatives to traditional passwords.
The last paragraph of the text suggests that________.
选项
A、net users regulate their online behaviors
B、net users rely on themselves for security
C、big websites limit the number of guesses
D、big websites offer users convenient access
答案
B
解析
推理题。根据题干定位到最后一段。A项“网络使用者要规范他们网上的行为”,文中未提及;C项“大型网站限制尝试输入密码的次数”,最后一段虽然有提到谷歌和微软,但并不是所有大型网站都这样做了;D项“大型网站为用户提供方便的登入”,文中没有提及;故排除A、C、D三项。B项“网络使用者要靠自己注意网络安全”,与最后一段最后一句的“So it’s time for users to consider the alternatives to traditional passwords”相符,故选B。
转载请注明原文地址:https://kaotiyun.com/show/STNd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Ididnotknowthecityatalland,whatismore,Icouldn’tspeakawordofthelanguage.Afterhavingspentmyfirstdaysight
Whatarethespeakerstalkingabout?
Lookatthepicturesbelowandwriteanessayofabout120wordsmakingreferencetothefollowingpoints:1)adescription
WhatisthecharacteristicoflearnersofspecialEnglish?
Theautomobilehasmanyadvantages.Aboveall,itofferspeoplefreedomtogowhereverandwhenevertheywanttogo.Thebasicp
Publicityoffersseveralbenefits.Therearenotcostsformessagetimeorspace.Anadinprime-timetelevisionmaycost$250,0
Americanarchitectureisatitsbestwhenitisconcernedwithbuildingsthathaveapracticalpurpose.Factories,officebuildi
PeopleofBurlingtonarebeingdisturbedbythesoundofbells.FourstudentsfromBurlingtonCollegeofHigherEducationarein
Mostmothershaveagoodpieceofadvice:Nevergointoasupermarkethungry!Ifyougoshoppingforfoodbeforelunchtime,you
Whydoesthewomanaskthemanforadvice?
随机试题
OneBritishschoolisfindingthatallowingchildrentolistentomusicoreventohavetheTVonwhilestudyingishelpingimpr
新病宜选:宿疾宜选:
动机产生的两个条件是
男,32岁,阑尾切除术后1天出现烦躁、剧烈腹痛,心率108次/分,血压90/60mmHg,腹胀,全腹压痛,肠鸣音弱,为除外腹腔内出血最准确的检查是()
某工程项目业主与施工单位于2017年12月按《建设工程施工合同(示范文本)》签订了施工合同,合同工期为11个月,2018年1月1日开工。合同约定的部分工作的工程量清单见表5—1,工程进度款按月结算,并按项目所在地工程造价指数进行调整(此外没有其他调价条款)
1.背景某工业建筑,建筑面积39000m2。群体工程,其中1号、2号主厂房分别为10000m2,单层钢结构;3号为科研楼,建筑面积9000m2,地上8层,地下2层,裙房3层,现浇钢筋混凝土框架一剪力墙结构,主梁跨度8.1m,外疏散楼梯宽度1.5m,外形复
对于盘亏固定资产的净损失,报经批准后应转入“营业外支出”账户。()
社会保障中的最大项目是()支出。
三十多年来,我国改革开放的实践充分证明,只有社会稳定,改革、发展才能不断推进;只有改革、发展不断推进,社会稳定才能具有坚实基础。要把改革力度、发展速度和社会可承受程度统一起来。正确处理改革、发展、稳定关系的重要结合点是()
求∫-11(|x|+x)e-|x|dx.
最新回复
(
0
)