topic111 unit 12练习.docx

topic111 unit 12练习.docx

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topic111unit12练习

AdvancedListening:

IIIU12ComputerSecurity

1.Computercriminalscanaccessprivateinformationbyillegallyenteringacomputersystem.

.access:

discoveranduse发现并使用、访问

2.Ifyouscrambleanelectronicmessage,mostpeoplewon'tliabletounderstandit.

scramble;mixelectronicsignals弄乱电子信号、使混乱

3.Althoughwedon'tknowwhatwillhappenwithcomputercrimeinthefuture,wecanimagineafewdifferentscenarios.

scenarios.possiblesituations可能的情景\情节

4.Computercriminalstrytocoveruptheircrimestoavoidpunishment.

coverup掩盖\hide隐藏

5.Manycomputercriminalsarenotcaughtbecauseitisverydifficulttodetectthetheftofcomputerinformation.

detect发现\察觉,发觉

6.Banksusecomputernetworkstotransferhugeamountsofmoneyfromonelocationtoanothereveryday.transfer:

move移动

7.WecangetlargeamountsofinformationviatheInternet.

viabywayof经由,作为

8.Thetransmissionofinformationoccurseverytimewesendane-mailmessageormakeaphonecall.

processofsendingasignal传送

9.Ifonerouteintoacomputersystemisblocked,computercriminalswillsearchforanother.

wwayfromoneplacetoanother

10.Acolleaguefromtheofficehadhercreditcardnumberstolenbyacomputercriminal.

someoneyouworkwith同事

11.Thesystemadministratorsworkhardtomaintaintheintegrityofthecompany'scomputersystems.

completeness完整\

II.ReadthedefinitionsofthetermsbelowandtranslatethemintoChinese.

1.Encrypt[加密,将...译成密码]vtochangetheformofcomputerinformationsothatitcannotbereadbypeoplewhoarenotsupposedtoseeit

2.hacker[电脑黑客]n.INFORMALsomeoneWHOusescomputersalot,especiallyinordertosecretlyuseorchangetheinformationinanotherperson'scomputersystem-hacking

3.impersonate[模仿,扮演,]vtopretendtobesomeonebycopyinghis/herappearance,voice,etc.inordertodeceivepeople.

4.modem[调制解调器]n.apieceofelectronicequipmentthatallowsinformationfromonecomputertobesentalongtelephonewirestoanothercomputer.

5.Virus[病毒]n.asetofinstructionssecretlyputintoacomputerthatcandestroyinformationstoredinit.

III.listentothelecture,trytonotethecausesandeffectsofcomputercrimeandalsothepossiblesolutions.

IVUseyournotestocompletetheoutlinebelow.

I.Reasonsforcomputercrime

A.Stealingandsellinginformation（financialgain）

B.Stealingmoney（financialgain）

C.Excitingchallenge

II.Effectsofcomputercrime

A.Oncompaniesand/orgovernments

1.Lostworkhours,shutdowncomputers

B.Onindividuals

1.Inconvenience

2.Financialloss

III.Possiblesolutions

A.Tougherpunishmentforcriminals

B.Firewalls

C.Difficultpasswords.

D.Access-controlsoftware

E.Encryptionsoftware

F.Audittrails

VUseyournotestodecideifthestatementsbelowaretrueorfalse.WriteT（true）orF（false）.Correctthefalsestatements.

lF.About50（40）percentofcompaniesthatareonlinehaveexperiencedcomputercrime.

2T.Morethan$400billionistransferredbytheU.S.bankingsystemeveryday.

____3T.Manycomputercriminalsaremotivatedbyfinancialgain.

____4F.Computerviruseshavenot（have）affectedgovernmentcomputersystems.

____5F.Thecourts'attitudetowardcomputercrimehas（gottenmuchtougher）changedlittleinrecentyears.

____6T.AfirewallstandsbetweentheInternetandacompany'sintranet.

____7F.Awordchosenfromalargedictionaryis（not）aneffectivepassword.

____8T.Access-controlsoftwarelimitspeople’saccesstoinformationandoperations.

____9TEEncreyptionsoftwarescramblesdatasothathackerscannotunderstandit.

____10T.Audittrailstellcomputerusersaboutattemptstohackintotheircomputersystems.

VI.Basedyournoteandexplainthefollowingreasons,effects,andsolutions.

1.Reasonsforcomputercrime

financialgainANDexcitingchallenge

2.Effectsofcomputercrimeoncompanies/governments

a.shutdowncomputersb.financiallossc.workstoppage

3.Effectsofcomputercrimeonindividuals

a.stolencreditcardnumbersb.impersonationc.computerscience

4.Solutionstoproblemofcomputercrime

a.courtsb.firewallsc.passwordsd.access-controlsoftware

e.encryptionsoftwaref.audittrails

VIIUseyournotestowriteasummaryofthelecture.30%题目ComputerSecurity

Concernedaboutthegrowingnumberofcomputeruserswhoareaccessingprivateorsecretinformation：

原因1．PCholdhugeamountsofinformation,andsomesensitive.theftofisfinanciallymotivated.stealsandthenpossiblysellsit.2stealmoneydirectly.thehardesthit

3。

forhacking

（1）forthechallenge

（2）feelangryorfeelpowerless结果：

（1）computersallovertheworldhavebeenshutdown,billionsofdollarsinworkhourslost.How：

transmissionofvirus

（2）creditcardnumber：

financialloss.（3）socialsecuritynumber：

impersonateyou.leadingtoseriousproblems

措施：

（1）courtsgettingtougherwithhackers

（2）firewalls（3）useoflessobviousandlesseasilyrememberedpasswords（4）access-controlsoftwareona"needtoknow"or"needtouse"basis.Encryptionsoftware（5）finally,audittrailsmonitortheuseofacomputertoidentifyanyuser

1.Whydopeopleengageincomputercrime?

Listthereasons.

First,theymaywanttostealandsellsensitiveinformation,suchassensitivebusinessinformation.Second,theymaywanttostealmoney.Third,theymayenjoythechallenge.

2.Describeatypicalhackingscenario.

Inatypicalhackingscenario,ahackersendsavirustoothercomputerusersviatheInternet.Thevirusenterstheuser'scomputeroperatingsystemandreplacesgoodfileswithcopiesofitself.Thenitsendsitselftootherusersthroughthecomputeruser'se-mailaddressbook.