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
56
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
GenerationsofAmericanshavebeenbrought【C1】______tobelievethatagoodbreakfastisimportantforhealth.Eatingbreakfast
GenerationsofAmericanshavebeenbrought【C1】______tobelievethatagoodbreakfastisimportantforhealth.Eatingbreakfast
GenerationsofAmericanshavebeenbrought【C1】______tobelievethatagoodbreakfastisimportantforhealth.Eatingbreakfast
Whatarethespeakersdoing?
Whenwethinkabouthappiness,weusuallythinkofsomethingextraordinary,apeakofgreatdelight--andthosepeaksseemtoget
Whichfactordetermineshumanbeings’psychologicalspaceneeds?
Onesummernight,onmywayhomefromworkIdecidedtoseeamovie.IknewthetheatrewouldbeairconditionedandIcouldn’tf
Statusesaremarveloushumaninventionsthatenableustogetalongwithoneanotherandtodeterminewherewe"fit"insociety.
PeopleofBurlingtonarebeingdisturbedbythesoundofbells.FourstudentsfromBurlingtonCollegeofHigherEducationarein
随机试题
主动脉瓣狭窄的病例,当跨瓣压差达到以下哪项权值则有手术指征
回阳救急汤的适应证是当归四逆汤的适应证是
可治胃热呕吐的药物有
依据《企业破产法》的规定,下列有关企业破产法中的债权人会议,说法正确的是:
图示地面块材主要为残疾人提供()用途。
下面不属于操作系统管理功能的是()。
工程桩偏位属于()。
(2009年考试真题)甲公司为增值税一般纳税人,增值税税率为17%。生产中所需W材料按实际成本核算,采用月末一次加权平均法计算和结转发出材料成本。2008年6月1日,W材料结存1400千克,账面余额385万元,未计提存货跌价准备。甲公司2008年6月份发生
公安机关对于具有()的犯罪嫌疑人,可以取保候审。
任何一高中生辍学都会失业,除非他或她找到一份低薪水的工作或者他或她有良好商业关系的亲戚。不能有效地从上面陈述中得出下面哪个结论?
最新回复
(
0
)