求作业答案：阅读理解.阅读理解.PasswordsarenosafeguardsTypingyourpasswordorcreditcardnumberintoacomputerisamoment'swork.Butifyouthinkyourperso

　　求作业答案：阅读理解.

　　阅读理解. Passwordsarenosafeguards

　　Typingyourpasswordorcreditcardnumberintoacomputerisamoment'swork.Butifyouthinkyour

　　personaldetailsdisappearassoonasyouhittheReturnkey,thinkagain:theycansitonthecomputer'shard

　　diskforyearswaitingforahacker(黑客)totakethem.

　　Aspeoplespendmoretimeonthewebandhackersbecomemoreexperienced,thedangersofstoring

　　personalinformationoncomputersaregrowingbytheday,securityexpertssay.Therearesomesafe-guards,

　　suchasneverallowingyourcomputertostoreyourpasswords.Buteventhatinnoguaranteeofsecurity.

　　Whenyoutypeinapassword,itisstoredinrandomaccessmemory(RAM),whereitisheldtemporarily

　　untilotherdataoverwritesitorthecomputerisswitchedoff.

　　Buteverysooften,thecomputercopiesthecontentsofitsRAMontoharddisk,whereitiseasytoprey

　　(捕获)forahacker,whocanreaditdirectlyordesignawormtoe-mailitback.Thelongersensitivedata

　　staysinRAM,themorelikelyitistobecopiedontothedisk,whereitstaysuntilitisoverwritten-whichmight

　　nothappenforyears.

　　TalGarfinkelandcolleaguesfromStanfordUniversityhavecreatedasoftwaretoolwhichsimulates(模拟)

　　theworkingsofacompletecomputersystem.Withinthesimulation,sensitivedatacanbetaggedandthen

　　trackedasitpassesthroughthesystem.Next,Garfinkelandhisteamsimulatedcomputersrunningcommon

　　softwarethatregularlyhandlespasswordsorsecretpersonalinformation,suchasInternetExplorer,the

　　WindowsloginscriptandApacheserversoftware.

　　Inapapert