Wired Equivalent Privacy yog ib qho qauv kev sib txuas lus uas ntxiv kev ruaj ntseg rau Wi-nkaus thiab lwm yam 802.11 wireless networks . WEP tau tsim los muab wireless networks sib npaug sib npaug ntawm kev tiv thaiv ntiag tug li ib lub lag luam uas zoo sib xws, tiam sis kev ua haujlwm tsis txaus siab ua rau nws siv tau.
Yuav Ua Li Cas WEP Ua Haujlwm
WEP siv ib cov qauv ntaub ntawv encryption uas siv kev sib xyaw ntawm cov neeg siv-thiab qhov system-generated qhov tseem ceeb. Thawj cov kev siv ntawm WEP txhawb kev tuav encryption ntawm 40 khoom ntxiv rau 24 cov khoom ntxiv ntawm cov ntaub ntawv-generated, ua rau cov yawm ntawm 64 cov khoom ntawm tag nrho cov ntev. Kom tiv thaiv kev tiv thaiv, txoj kev encryption no tau txuas ntxiv mus txhawb cov yawm sij ntev xws li 104-ntsis (128 cov khoom ntawm tag nrho cov ntaub ntawv), 128-ntsis (152 khoom tag nrho) thiab 232-ntsis (256 khoom tag nrho) kev hloov.
Thaum deployed dua Wi-nkaus kev twb kev txuas , WEP encrypts cov ntaub ntawv kwj siv cov yawm sij kom nws tsis yog neeg nyeem tau yooj yim tab sis tseem yuav ua tau tiav los ntawm kev pab kiag li lawm. Cov yuam sij rau lawv tus kheej tsis xa tawm hauv lub network, tiam sis nws tsis yog nyob ntawm lub wireless adapter lossis hauv lub qhov rais Registry.
WEP thiab Tsev Network
Cov neeg tau txais kev pabcuam uas yuav 802.11b / g routers nyob rau thaum xyoo 2000s twb tsis muaj cov kev ruaj ntseg hauv Wi-nkaus kev ruaj ntseg uas tsis muaj WEP. Nws tau pab lub ntsiab lus tseem ceeb ntawm kev tiv thaiv ib lub tsev network los ntawm kev nkag los ntawm kev nkag los ntawm cov neeg nyob ze.
Tsev broadband routers uas txhawb WEP feem ntau tso cai rau cov neeg khiav dej num nkag mus txog plaub lub rooj sib tham ntawm WEP rau hauv lub router console ces tus router txais kev sib txuas ntawm cov neeg tau teeb tsa nrog ib qho ntawm cov yuam sij no. Thaum lub sijhawm no tsis ua kom muaj kev ruaj ntseg ntawm txhua tus neeg qhov kev sib txuas, nws muab cov thawj xibfwb ib qho ntxiv ntawm kev yeem rau kev faib khoom rau cov neeg siv khoom. Piv txwv, ib tus tswv tsev yuav xaiv ib qhov tseem ceeb rau cov neeg hauv tsev neeg thiab lwm tus neeg siv rau cov neeg tuaj xyuas. Nrog rau qhov no, lawv tuaj yeem xaiv los hloov lossis tshem cov qhua tawm thaum lub sij hawm lawv xav tau yam tsis muaj kev hloov kho tsev neeg lub cuab tam.
Vim li cas WEP tsis pom zoo rau Kev Siv
WEP tau pib rau xyoo 1999. Ob peb xyoo dhau los, ntau cov neeg soj ntsuam xyuas kev ruaj ntseg pom muaj qhov tsis zoo hauv nws cov qauv. Qhov "24 qhov ntxiv ntawm cov ntaub ntawv-tawm-sau" saum toj no yog technically hu ua Tus Initialization Vector thiab ua pov thawj los ua tus tseem ceeb tshaj plaws cov kev cai yoojyim. Muaj cov cuab yeej yooj yooj yim thiab nkag tau yooj yim, ib tug neeg nyiag tsheb tuaj yeem txiav txim siab rau qhov tseem ceeb ntawm WEP thiab siv nws los mus ua ib qho kev sib txuas ntawm Wi-nkaus li ntawm ob peb feeb.
Kev tsim kho zoo tshaj plaws rau WEP xws li WEP + thiab Dynamic WEP tau siv rau hauv kev sim ua kom patch qee yam ntawm cov kev cuam tshuam ntawm WEP, tab sis cov technologies no tseem tsis tau muaj hnub no.
Kev hloov rau WEP
WEP tau txais kev tso cai los ntawm WPA hauv xyoo 2004, uas tom qab ntawd tau muab los ntawm WPA2 . Thaum khiav lub network nrog WEP enabled yog arguably zoo dua khiav tsis muaj kev tiv thaiv wireless encryption txhua, qhov txawv yog negligible ntawm kev ruaj ntseg foundations.