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
A variety of simple techniques can prevent computer crime. For example, destroying printed information, protecting computer scre
A variety of simple techniques can prevent computer crime. For example, destroying printed information, protecting computer scre
admin
2010-12-25
42
问题
A variety of simple techniques can prevent computer crime. For example, destroying printed information, protecting computer screens from observation. Keeping printed information and computers in locked cabinets, and clearing desktops of sensitive documents prevent access to confidential information. But more sophisticated methods are also necessary to prevent computer crimes.
One technique to protect confidentiality is encryption. Information can be scrambled and unscrambled u-sing mathematical equations and a secret code called a key. Two keys ale usually employed, one to encode and the other to decode the information. The key that encodes the data, called the private key, is possessed by only the sender. The key that decodes the data, called the public key, may be possessed by several receivers. The keys are modified periodically, further hampering unauthorized access and making the encrypted information difficult to decode or forge.
Another technique to prevent computer crime is to limit access of computer data files to approved users. Access control software verifies computer users and limits their privileges to view and alter files. Records can be made of the files accessed, thereby making users accountable for their actions. Military organizations give access rights to classified, confidential, secret, or top-secret information according to the corresponding security clearance level of the user. Passwords are confidential sequences of characters that give approved users access to computers. To be effective, passwords must be difficult to guess. Effective passwords contain a mixture of characters and symbols that are not real words.
Tokens are tamper-resistant plastic cards with microprocessor chips that contain a stored password that automatically and frequently changes. When a computer is accessed using a token, the computer reads the token’s password, as well as another password entered by the user, and matches these two to an identical list In the future, passwords and tokens may be reinforced by biometrics, identification methods that use u-nique personal characteristics, such as fingerprints, retinal patterns, skin oils, deoxyribonucleic acid (DNA), voice variations, and keyboard-typingrhythms.
Computer networks, multiple computers linked together, are particularly vulnerable to computer crimes. Information on networks can be protected by a firewall, a computer placed between the networked computers and the network. The firewall prevents unauthorized users from gaining access to the computers on a network, and it ensures that information received from an outside source does not contain computer viruses, self-replicating computer programs that interfere with a computer’s functions.
Which of the following passwords does not belong to biometrics?
选项
A、numbers
B、fingerprints
C、DNA
D、voice variations
答案
A
解析
文章指出,在将来,生物识别系统或许可以加强密码作用,如指纹、视网膜、皮肤、DNA、声音。以及键盘输入节奏.第四段In the future,passwords and tokens may be reinforced by biomet.rics…such as fingerprints,retinal patterns,skin oils。deoxyribonucleic acid(DNA),voice variations,and keyboard-typing rhythms.
转载请注明原文地址:https://kaotiyun.com/show/XsBO777K
0
考博英语
相关试题推荐
Thebiggestproblemwiththecomputeristhat
Message2Questions18—22
Youwillheartwotelephoneconversations.Writedownonewordornumberinthespacesontheformsbelow.Message1Questions
Howmuchshouldthemanpay?
Lookatthenotesbelow.Someinformationismissing.YouwillhearajournalisttalkingtotheHeadofPublicRelationsofala
Whichdepartmentdoesthewomanworkfor?
HowtoapproachWritingTestPartTwo•Thisparttestsyourabilitytowritelongerletters,Faxesandemails.•Readtheinstruc
AssistantToPublicRelationsManagerBusinessPressistheworld’smostrespectedpublisherofbusinessnews.PRandpubli
Thehousesinthisareawereallerectedin______ofhousingregulations.
Animportantpointinthedevelopmentofagovernmentalagencyisthecodificationofitscontrollingpractices.Thestudyofla
随机试题
双掌分推肩背部可以()。
低渗性缺水时,在血清钠尚未明显降低之前,尿钠含量
感染性心内膜炎的瓣膜疣赘物的特点是
革兰染色阴性、呈双肾状排列、坦面相对的细菌最可能为
患者,女性,50岁。腹股沟韧带内侧的下方突然出现半球形包块,疼痛、不能回纳,伴恶心、呕吐,肛门不排气。腹透:腹腔胀气,有数个液平。该患者可能的诊断是
2015年1月1日,甲公司将其持有乙公司90%股权投资的1/3对外出售,取得价款7500万元,剩余60%股权仍能够对乙公司实施控制。出售投资当日,乙公司自甲公司取得其90%股权投资之日持续计算的应当纳入甲公司合并财务报表的可辨认净资产总额为25500万元,
这是一次美工活动。孩子们试着用各种盒子和彩色纸制作玩具。几个设计简单的孩子先做好了,而设计得比较复杂的孩子甚至连一半也没做完。这时,老师请大家注意听做好的孩子介绍作品,但几乎没有人听,因为大部分儿童仍忙着自己的事。老师多次提醒也没有效果,最后让大家把东西收
我国一贯奉行独立自主的和平外交政策,这是由()。
甲、乙两个书架,共有书3000册,甲的册数的比乙的册数的多420本,求两个书架各有书多少册?
法律解释的方法有时是综合使用的,在通常情况下,最先使用的一个基本方法是()。
最新回复
(
0
)