20.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-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 personal 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,the 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 experiment where 63people were asked to create a gesture,recall it,and recall it again 10days later.The gestures were captured on a recognizer system designed by the team.Using this data,they tested the complexity and accuracy of each gesture using information theory.The result of their analysis is that people are favorable 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 touchscreens(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 gestures with enough accuracy.The 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 analyze the security and management of free-form passwords in the future.They believe this is the first study to explore free-form gestures as passwords.They will soon publish their findings.
32.What can we learn about free-form gestures?A
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.
33.The experiment in paragraph 4is to testD of free-form gestures.
A.template
B.application
C.accuracy
D.security
34.According to the text,the researchers think thatB.
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
35.The main purpose of the text is toD.
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.
分析 本文是一篇说明文.随着智能手机的日益普及,存储于手机内的个人信息和密码的安全愈发重要.科学家研究发现,用手势或图案代替传统的密码能加强密码的保密性.
解答 32---35 ADBD
32.A细节判断题.根据第一段These gestures are less likely to be observed and reproduced by others than traditional typed passwords."这些姿势都比传统的密码更难被窥伺,更难重现."可知答案为A.
33.D细节判断题.根据题目定位到第四段,由None of them were able to copy the gestures with enough accuracy."他们都无法准确地复制这些姿势"可知答案为D.
34.B细节判断题.根据最后一段…the research team plans to continue to analyze the security and management of free-form passwords in the future."研究团队计划继续分析未来的自由模式密码的安全性和管理".可知,the research team将继续在该领域展开研究,即他们认为应研发更好的密码系统,故答案为B.
35.D.写作意图题."新的调查显示自由形式的手势可用来解锁智能手机,例如,在智能手机的屏幕上挥舞手指形成某种图案".可知本文旨在介绍相关new password的实验,故答案为D.
点评 做本题时,首先要快速浏览全文,把握文章的主旨大意,理清作者的写作思路;然后结合上下文,逐句分析,并正确理解题干的意思;最后结合选项中内容,找到符合文意的选项.