@翻了个译，MTI专业辅导@翻了个译，MTI专业辅导Thesmallwarheadistakingonecascade,andspinninguptherotorsandslowingthemdown,andthebigwarheadistalkingtosixcascadesandmanipulatingvalves.Soinall,weareveryconfidentthatwehaveactuallydeterminedwhatthetargetis.ItisNatanz,anditisonlyNatanz.Sowedon'thavetoworrythatothertargetsmightbehitbyStuxnet.Here'ssomeverycoolstuffthatwesaw--reallyknockedmysocksoff.Downthereisthegraybox,andonthetopyouseethecentrifuges.Nowwhatthisthingdoesisitinterceptstheinputvaluesfromsensors--soforexample,frompressuresensorsandvibrationsensors--anditprovideslegitimateprogramcode,whichisstillrunningduringtheattack,withfakeinputdata.Andasamatteroffact,thisfakeinputdataisactuallyprerecordedbyStuxnet.Soit'sjustlikefromtheHollywoodmovieswhereduringtheheist,theobservationcameraisfedwithprerecordedvideo.That'scool,huh?Uh,theideahereisobviouslynotonlytofooltheoperatorsinthecontrolroom.Itactuallyismuchmoredangerousandaggressive.Theideahereistocircumventadigitalsafetysystem.Weneeddigitalsafetysystemswhereahumanoperatorcouldnotactquickenough.Soforexample,inapowerplant,whenyourbigsteamturbinegetstoooverspeed,youmustopenreliefvalveswithinamillisecond.Obviously,thiscannotbedonebyahumanoperator.Sothisiswhereweneeddigitalsafetysystems.Andwhentheyarecompromised,thenrealbadthingscanhappen.Yourplantcanblowup.Andneitheryouroperatorsnoryoursafetysystemwillnoticeit.That'sscary.Butitgetsworse.
