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
No document is safe any more. Faking once the domain of skilled deceivers that used expensive engraving (雕刻) and printing equipm
No document is safe any more. Faking once the domain of skilled deceivers that used expensive engraving (雕刻) and printing equipm
admin
2012-12-13
80
问题
No document is safe any more. Faking once the domain of skilled deceivers that used expensive engraving (雕刻) and printing equipment, has gone mainstream since the price of desktop-publishing systems has dropped. In ancient times, faking was a hanging offence. Today, desktop counterfeiters have little reason to worry about prison, because the systems they use are universal and there is no means of tracing forged documents to the machine that produced them. This, however, may soon change thanks to technology development by George Chiu, an anti-faking engineer.
His approach is based on detecting imperfections in the print quality of documents. Old-school court scientists were able to trace documents to particular typewriters based on quirks (弯曲) of the individual keys. He employs a similar approach, exploiting the fact that the rotating drums and mirrors inside a printer are imperfect pieces of engineering which leave unique patterns of banding in their products.
Although these patterns are invisible to the naked eye, they can be detected and analyzed by computer programs, and it is these that Dr. Chiu has spent the past year devising. So far, he cannot trace individual printers, but he can tell pretty reliably which make and model of printer was used to create a document.
That, however, is only the beginning. While it remains to be seen whether it will be possible to trace a counterfeit (伪造的) document back to its guilty creator on the basis of manufacturing imperfections, Dr. Chiu is now working out ways to make those imperfections deliberate. He wants to modify the printing process so that unique, invisible signatures can be incorporated into each machine produced which would make any document traceable.
Ironically, it was after years of collaborating with printing companies to reduce banding and thus increase the quality of prints, that he came up with the idea of introducing artificial banding that could encode identification information into a document. Using the banding patterns of printers to secure documents would be both cheap to implement and hard, if not impossible, for those without specialist knowledge and hardware to hide out.
Not surprising, the American Secret Service is monitoring the progress of this research very closely, and is providing guidelines to help Dr. Chiu to travel in what the service thinks is the right direction, which is fine for catching criminals. But how the legal users of printers will react to Big Brother being able to track any document back to its source remains to be seen.
The advantage of using banding patterns to trace documents is that it______.
选项
A、is economically affordable and technically practical
B、strengthens the cooperation among printing companies
C、makes printers cheaper and hard to be taken around
D、is able to identify even the most specialized criminals
答案
A
解析
推理判断题。原文说“利用打印机频带模式来确保文件的安全性,不仅在安装上成本低,如果可能的话,还可以使那些没有专业知识和硬件的罪犯难以逃脱。”由此可以推知,利用频带模式追踪文件的优势在于经济上可以承受而且技术上可行。故A)与之相符,为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/rrw7777K
0
大学英语四级
相关试题推荐
Youmayhavewonderedwhythesupermarketsareallthesame.Itisnotbecausethecompaniesthatoperatethemlackimagination.
A、Oneissafeifheisverycareful.B、Hi-techsafetyequipmentensuresone’ssafety.C、Alotofpeopledorock-climbingandthe
Shewasgladthedifficulty,whichshehadthoughtwouldremainforalongtime,hadbeen______.
Becauseheisbusymakingmoneynow,heis______ofnewdevelopmentsinhisoriginalfield.
A、Thecolorsuitsher.B、Itgoeswithhershoes.C、Itisalittlebitexpensive.D、Thestyledoesn’tfitherwell.A由男士提到的Itfit
A、Crowdedairtraffic.B、Thelargesizeofairplanes.C、Mistakesmadebyairtrafficcontrollers.D、Badweather.C
TheHonolulubeachusedtobealotlesscrowded30yearsago.Inthosedays,youcouldwalkalonghereandnot【B1】______intope
TheHonolulubeachusedtobealotlesscrowded30yearsago.Inthosedays,youcouldwalkalonghereandnot【B1】______intope
TheHonolulubeachusedtobealotlesscrowded30yearsago.Inthosedays,youcouldwalkalonghereandnot【B1】______intope
随机试题
___________是行政组织的基本元素和细胞,职位之间的权责关系构成了整个行政组织的结构。___________是组织结构建立的依据,是组织的层次和部门划分,以及职位配置的出发点和归宿。
2012年获得诺贝尔文学奖的作家是()
男性,32岁,劳动中腰部扭伤3天,腰部剧烈疼痛,不能活动。检查:腰椎右侧压痛,用力时局部可摸到一有弹性的肿块,放松时消失。右直腿抬高试验阳性,神经系统查体阴性。在行X线检查前,应怀疑下列哪种疾病
A.医师为患者选用疗效相当但价格低廉的药物B.医师为患者提供完全、真实的信息,供其选择表态C.医师使用艾滋病患者病情资料时,应作隐去姓名等处理D.医师诊断时应考虑患者的各方面因素E.医师治疗时应努力使患者受益最能体现知情同意准则的是
推进依法行政、转变政府职能要求健全透明预算制度。修改后的《预算法》规定,经本级人大或者常委会批准的政府预算、预算调整和决算,应及时向社会公开,部门预算、决算及报表也应向社会公开。对此,下列哪一说法是错误的?(2017年卷一2题)
桑代克提出的三条学习定律是()。
公安队伍建设的终极目标是()。
主张“世界上除了运动着的物质之外,什么也没有”的观点,属于( )
VirtualDriverDrivinginvolvessharpeyesandkeenears,analyzingwithabrain,andcoordinationbetweenhands,feetandb
BothEnglishandFrench______inCanada.
最新回复
(
0
)