Tsev > Exhibition > Ntsiab lus

Kab Nqis Quav Kev Ruaj Ntseg

Mar 08, 2019

Cov txheej txheem hauv kev ruaj ntseg feem ntau nyob rau hauv cov cav tov uas yuav tsum tau khiav tsis tu ncua rau xyoo tsis muaj qhov teeb meem, thiab qee lub caij rov qab los ntawm lawv tus kheej yog tias muaj qhov yuam kev tshwm sim. Yog li, software feem ntau yog tsim thiab ntsuam xyuas kom zoo zoo tshaj qhov ntawd rau cov kev siv tshuab hlwb hlau, thiab kev ua haujlwm tsis zoo ib yam xws li disk drives, keyboards lossis nyees khawm.


Tej teeb meem kev txhawj xeeb muaj xws li:


Lub system tsis tuaj yeem tsis raug kaw rau kev kho, los yog nws yog ib qho dhau mus tsis kho. Piv txwv li lub nruab qhov chaw, kab xev hauv dej, cov paib qhov chaw, lub qhov-qhov, thiab cov tsheb.

Lub kaw lus yuav tsum ceev cia kom muaj kev ruaj ntseg. "Limp hom" yog qhov tsawg dua. Feem ntau cov backups raug xaiv los ntawm tus neeg teb xov tooj. Piv txwv xws li aircraft navigate, reactor tswj tshuab, kev nyab xeeb-tshuaj tseem ceeb heev tshuaj Hoobkas tswj, tsheb ciav hlau teeb liab.

Lub kaw lus yuav plam loj nyiaj thaum kaw: Xov tooj hloov, lub Hoobkas tswj, choj thiab lub elevator tswj, kev hloov nyiaj thiab kev ua lag luam, kev muag khoom thiab kev pab cuam.

Kev siv ntau hom kev siv, qee zaum ua ke nrog, rov qab los ntawm cov teeb meem-ob qho tib si ntawm software yoov xws li nco txia, thiab tseem ua yuam kev hauv lub cuab yeej:


watchdog timer uas ua haujlwm rau lub computer tshwj tsis yog tias lub sijhawm qhia software yuav ceeb toom rau watchdog subsystems nrog redundant spares uas tau hloov mus rau software "limp modes" uas muab ib nrab

Kev tsim kho nrog lub koom haum Trusted Base (TCB) ua kom muaj kev ruaj ntseg thiab txhim khu kev qha zoo

Ib tug hypervisor tsim rau embedded systems, yog muaj peev xwm muab kev ruaj ntseg encapsulation rau txhua yam subsystem feem, yog li ntawd ib qho software tivthaiv tsis tuaj yeem cuam tshuam nrog lwm subsystems, los yog privileged theem system software. Qhov no encapsulation ceev fais los ntawm propagating los ntawm ib tug subsystem mus rau lwm, li kev txhim kho kev ntseeg. Qhov no kuj tseem yuav tso cai rau lub subsystem kom tau txais kev pab kaw thiab rov qab pib ntawm kev txheeb xyuas qhov tseeb.

Kev Tiv Thaiv Kev Txawj Ntse