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(觸摸屏),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.a(chǎn)pplication
C.a(chǎn)ccuracy
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.a(chǎn)dvise 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 本文是一篇說(shuō)明文.隨著智能手機(jī)的日益普及,存儲(chǔ)于手機(jī)內(nèi)的個(gè)人信息和密碼的安全愈發(fā)重要.科學(xué)家研究發(fā)現(xiàn),用手勢(shì)或圖案代替?zhèn)鹘y(tǒng)的密碼能加強(qiáng)密碼的保密性.
解答 32---35 ADBD
32.A細(xì)節(jié)判斷題.根據(jù)第一段These gestures are less likely to be observed and reproduced by others than traditional typed passwords."這些姿勢(shì)都比傳統(tǒng)的密碼更難被窺伺,更難重現(xiàn)."可知答案為A.
33.D細(xì)節(jié)判斷題.根據(jù)題目定位到第四段,由None of them were able to copy the gestures with enough accuracy."他們都無(wú)法準(zhǔn)確地復(fù)制這些姿勢(shì)"可知答案為D.
34.B細(xì)節(jié)判斷題.根據(jù)最后一段…the research team plans to continue to analyze the security and management of free-form passwords in the future."研究團(tuán)隊(duì)計(jì)劃繼續(xù)分析未來(lái)的自由模式密碼的安全性和管理".可知,the research team將繼續(xù)在該領(lǐng)域展開(kāi)研究,即他們認(rèn)為應(yīng)研發(fā)更好的密碼系統(tǒng),故答案為B.
35.D.寫(xiě)作意圖題."新的調(diào)查顯示自由形式的手勢(shì)可用來(lái)解鎖智能手機(jī),例如,在智能手機(jī)的屏幕上揮舞手指形成某種圖案".可知本文旨在介紹相關(guān)new password的實(shí)驗(yàn),故答案為D.
點(diǎn)評(píng) 做本題時(shí),首先要快速瀏覽全文,把握文章的主旨大意,理清作者的寫(xiě)作思路;然后結(jié)合上下文,逐句分析,并正確理解題干的意思;最后結(jié)合選項(xiàng)中內(nèi)容,找到符合文意的選項(xiàng).