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.
It is indicated in the text that________.
选项
A、Indonesians are sensitive to password security
B、young people tend to have secure passwords
C、nag screens help little in password security
D、passwords for credit cards are usually safe
答案
C
解析
推理题。A项“印尼人对密码安全很敏感”,这与第四段第三句中“those who spoke Indonesian the least”相反;B项“年轻人倾向使用安全的密码”,这与第四段第二句“Older users had better passwords than young ones”相反;D项“信用卡的密码通常是安全的”,这与第四段第四句“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”相反;故排除A、B、D三项。C项“提示窗口对密码安全帮助不大”,与第四段第五句…Nag screens that told users they had chosen a weak password made virtually no difference”相符,故选C。
转载请注明原文地址:https://kaotiyun.com/show/qTNd777K
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
Youhavereadthefollowingmagazineadvertisementinwhichacertaincompanyislookingforanofficeassistant.Youwanttowr
Whatarethespeakerstalkingabout?
Whatarethespeakerstalkingabout?
ReadthefollowingtextsinwhichfivepeopletalkedabouttheadvantagesandthedisadvantagesofwatchingTV.Forquestions61
Whenwethinkabouthappiness,weusuallythinkofsomethingextraordinary,apeakofgreatdelight--andthosepeaksseemtoget
WhendopeopleusuallywearT-shirts?
Readthetextsfromanarticle,Forfivequestions,matcheachrule(1to5)tooneofthestatements(AtoG)givenbelow.Mark
Readthetextsfromanarticle,Forfivequestions,matcheachrule(lto5)tooneofthestatements(AtoG)givenbelow.Mark
Onesummernight,onmywayhomefromworkIdecidedtoseeamovie.IknewthetheatrewouldbeairconditionedandIcouldn’tf
Theevolutionofartificialintelligenceisnowproceedingsorapidlythat【C1】______themiddleofthiscenturycheapcomputers【C
随机试题
肝门静脉的主要属支有哪些?
可以转化生成儿茶酚胺的氨基酸是
对于电源变压器功率、电源电阻、电源波动范围和地线接地电阻,CT机均有严格要求。CT机的电源电阻应小于
下列关于表示流行强度的术语,正确的是
可以防治夜盲症的是()
居民企业来源于境外的应税所得,已在境外缴纳的所得税税额,可以在抵免限额范围内从当期应纳税额中抵免,超过抵免限额的部分可以在以后5个年度内,用每年度抵免限额抵免当年应抵税额之后的余额进行抵补。()
凸版是版画中最常见的类型。()
宗炳《画山水序》对山水画提出了哪些重要意见?
下列选项中,属于遗产管理人职责的是()
Culturereferstothesocialheritageofapeople—thelearnedpatternsforthinking,feelingandactingthatcharacterizea
最新回复
(
0
)