Question

B [2015 '商丘高三一模]

As more people use smart phones to pay bills and store personal information, strict password security has become more important than ever. A new study shows that free-form gestures―sweeping fingers in shapes across the screen of a smart phone一can be used to unlock phones. These gestures are less likely to be observed and reproduced by others than traditional typed passwords.

"All that it takes to steal a password is a quick eye," said one of the researchers of the study. "With all the person?al information we have on our phones today, improving their security is becoming increasingly necessary. ，， In developing a secure solution to this problem, the researchers studied the practicality of using free-form gestures. With the ability to create any shape in any size and location on the screen? these gestures were popular as passwords. Since users create them without following a template* the researchers predicted these gestures would allow for greater complexity.

The researchers carried out a create-test-retest experi?ment where 63 people were asked to create a gesture, recall it, and recall it again 10 days later. These gestures were cap?tured on a recognizer system designed by the team. Using this data, they tested the complexity and accuracy of each gesture usijig information theory. The result of their analysis is that people are favourable to use free-form gestures as passwords.

To put their analysis into practice, the researchers then had seven students in computer science and engineering, each with considerable experience with touch screens (触摸屏)， attempt to steal a free-form gesture password by observing a phone user secretly. None of them were able to copy the ges?tures with enough accuracy. These gestures appear to be extremely powerful against attacks.

Though the testing is in its early stage and widespread adaptation of this technology is not yet clear, the research team plans to continue to analyse the security and manage?ment of free-form passwords in thefuture. They believe this is the first study to explore free-form gestures as passwords. They willsoonpublish their findings.

5.What can we learn about free-form gestures?

 

A.     They are improving mobile security in a way.

B.     Users will have to make use of simple gestures.

C.     They will never be copied by others.

D.     Users must move their fingers in fixed shapes.

6.The experiment in Paragraph 4 is to test the ______________  of

free-form gestures.

A. template                               B. application

C.  accuracy                            D. security

7.According   to   the  text,   the  researchers   think that

A.     it is easy to steal any password with a quick eye

B.     better ways of setting passwords should be developed

C.     people had better not use smart phones to pay bills

D.     personal information should not be stored in a phone

8.The main purpose of the text is to_____________ .

 

A.     advise people to use free-form gestures

B.     discuss whether smart phones are safe

C.     talk about the practicality of passwords

D.     introduce the study of a new password

Answer 1

B [文章大意]本文是一篇科普文，主要讨论了手机密码的安全性。文章介绍了 一种密码设置方式，并提出保护手机中的个人信息还有待继续研发新的密码设置方式。

5.A 细节理解题。根据第一段的"These gestures are less likely to be observed and reproduced by others than traditional typed pass-words."可知这种密码设置方式能够在某种程度上提高手机的安全性。故选A项。

6.D 推理判断题。根据文章第四段的"None of them were able to copy the gestures with enough accuracy. These gestures appear to be extremely powerful against attacks."可知，该项研究就是为了验证这种密码设置方式的安全性。故选D项。

7.B推理判断题。根据文章最后一段的"They believe this is the first study to explore free-form gestures as passwords. They will soon publish their findings."可知选B项。

8.D主旨大意题。通读全文可知，本文主要介绍了 一种新的密码设置方式。故选D项。