•Atmel-ThinkPadT60/R60/X60/X300,ThinkCentreM57
•Intel-ThinkPadT500/R500/X200/X301
•STMicro-ThinkPadT410/T510/X201/T420/T520/X220,ThinkCentreM90
•Winbond-ThinkCentreM58
TheseTPMshavedifferentcharacteristicswhentheyenterlockoutmode,asdescribedbelow:
AtmelTPM:
•Nolockoutduringtherst15badpasswordattempts
•The16thbadpasswordattemptresultsinalockoutperiodof1.1minutes
•Then,nolockoutduringthenext15badpasswordattempts
•Thenextlockoutperiodis2.2minutes
•Eachlockoutperioddoubles,aftereachbatchof15badpasswordattempts,uptoamaximumlockout
periodof4.7hours
•Lockoutisresetifthecomputeristurnedoff
IntelTPM:
•Nolockoutduringtherst100badpasswordattempts
•The101stbadpasswordattemptresultsinalockoutperiodof16seconds
•Eachsubsequentbadpasswordattemptresultsinalockoutperiodtwiceaslongasthepreviouslockout
period,withoutamaximumlockoutperiod
•Thebadpasswordcounterdecreasesbyoneeachhour,untilitdecreasestozero
STMicroTPM:
•Nolockoutduringtherst40badpasswordattempts
•The41stbadpasswordattemptresultsinalockoutperiodofthreeseconds
•Eachsubsequentbadpasswordattemptresultsinalockoutperiodtwiceaslongasthepreviouslockout
period,withamaximumlockoutperiodoftwohours
WinbondTPM:
•Therstbadpasswordattemptresultsinalockoutperiodof0.25millisecond
•Eachsubsequentbadpasswordattemptresultsinalockoutperiodtwiceaslongasthepreviouslockout
period,withamaximumlockoutperiodof14hours
Note:Ittakes13badattemptstoreachalockoutperiodofonesecond.
•After24hours,thebadpasswordcounterisresettozero
74ClientSecuritySolution8.3DeploymentGuide
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