Nyob rau lub sijhawm tam sim no ntawm kev tsim cov ntaub ntawv thev naus laus zis, tib neeg tuaj yeem eavesdropped txhua lub sijhawm thiab nyob qhov twg, yog li nws yog qhov tseem ceeb tshwj xeeb los tiv thaiv tus kheej ntiag tug. Lub kaw lus jammer yog ib qho khoom siv tiv thaiv kev ceev ntiag tug.
Daim ntawv no yuav qhia txog lub hauv paus ntsiab lus thiab daim ntawv thov scenario ntawm lub kaw lus jammer.
1. Technical txoj cai ntawm kaw jammer
Cov ntaubntawv povthawj siv jammer yog ib hom khoom siv hluav taws xob, nws lub hauv paus ntsiab lus yog tsim kom muaj kev cuam tshuam ntau zaus, cuam tshuam rau kev ua haujlwm ntawm cov khoom siv kaw lus, kom cov cuab yeej kaw tsis tuaj yeem kaw suab. Nyob rau hauv cov ntaubntawv povthawj siv jammer, lub high-frequency interference teeb liab yog generated los ntawm lub high-frequency oscillator, thiab yog amplified thiab lim kom nws cuam tshuam cov nyhuv pom tseeb.
Lub hauv paus ntsiab lus ua haujlwm ntawm lub kaw lus kaw tuaj yeem muab faib ua ob txoj hauv kev:
Ib qho yog los ntawm cov tiam ntawm ultrasonic mixing technology, los ntawm lub built-in ultrasonic transducer tsav lub ultrasonic sojntsuam pab pawg kom emit ib tug ntau yam ntawm frequencies ntawm ultrasonic tsis muaj peev xwm yuav hnov los ntawm tib neeg pob ntseg rau nws. Kev sib xyaw ultrasonic tsis yog demodulated los ntawm huab cua los tsim cov zaus uas tuaj yeem khaws tau los ntawm cov xov tooj ntawm tes, sau cwj mem thiab lwm yam khoom siv digital. Ultrasonic kev taw qhia muaj zog, kev sib kis deb deb, lub suab siab theem yog loj, thiaj li yuav npog lub suab ntawm kev hais lus, kom lub suab kaw tsuas yog "buzz" suab nrov, kom tsis txhob muaj cov ntaub ntawv to.
Ultrasound yog ib feem ntawm lub suab nthwv dej, yog tib neeg pob ntseg hnov tsis tau, zaus siab dua 20Khz suab tsis, nws thiab suab nthwv dej muaj sib xws, uas yog, yog tsim los ntawm cov khoom vibration, thiab tsuas yog kis tau nyob rau hauv nruab nrab.
Lwm qhov yog los tsim cov teeb liab ntau zaus, kom lub microphone ntawm cov cuab yeej kaw tsis tuaj yeem tau txais lub suab nrov ib txwm muaj, kom ua tiav cov txiaj ntsig cuam tshuam. Ob txoj hauv kev tuaj yeem cuam tshuam nrog kev ua haujlwm ib txwm ua ntawm cov cuab yeej kaw kom ua tiav cov txiaj ntsig ntawm kev tiv thaiv tus kheej.
2. Daim ntawv thov scenario ntawm kaw jammer
Cov ntaub ntawv jammers tuaj yeem siv ntau yam xwm txheej, feem ntau suav nrog cov hauv qab no:
Kev sib tham ua lag luam: Kev sib tham ua lag luam yog qhov chaw tsis pub lwm tus paub, thiab cov ntaub ntawv kaw cia tuaj yeem tiv thaiv cov txheej txheem kev sib tham los ntawm kev eavesdroped. Yog li ntawd, kev sib tham ua lag luam yog ib qho ntawm feem ntau daim ntawv thov scenarios ntawm kaw jammers.
Kev tiv thaiv tus kheej tsis pub leej twg paub: Hauv qee qhov chaw pej xeem lossis ntiag tug, xws li chav tsev so, chaw ua haujlwm, tsheb, thiab lwm yam, kev siv cov kaw lus kaw tuaj yeem tiv thaiv tus kheej tsis pub lwm tus paub thiab zam kev ntiag tug ntawm tus kheej raug xaim.
Kev tsis pub lwm tus paub hauv chav sib tham: chav sib tham yog ib qhov chaw tsis pub lwm tus paub hauv kev lag luam, yog li kev siv cov ntaub ntawv kaw cia hauv chav sib tham tuaj yeem tiv thaiv cov ntaub ntawv tsis pub lwm tus paub los ntawm kev xau.
Cov koom haum txawj ntse: Eavesdropping thiab anti-eavesdropping thev naus laus zis yog ib feem tseem ceeb ntawm cov koom haum txawj ntse. Raws li ib yam ntawm cov cuab yeej los tiv thaiv eavesdropping, audio jammers tuaj yeem pab cov koom haum txawj ntse tiv thaiv kev ruaj ntseg ntawm cov ntaub ntawv tseem ceeb.
Kev tshawb nrhiav kev tshawb fawb: Hauv qee qhov kev tshawb fawb tshawb fawb, nws yog ib qho tsim nyog los sau cov txheej txheem kev sim rau cov ntaub ntawv tom ntej. Txawm li cas los xij, yog tias cov txheej txheem kev sim raug kaw tsis raug cai lossis raug nyiag lawm, nws yuav nthuav tawm cov ntaub ntawv tseem ceeb thiab cov txiaj ntsig kev tshawb fawb ntawm qhov kev sim, ua rau qhov kev sim poob nws qhov tseem ceeb. Yog li ntawd, nyob rau hauv kev tshawb fawb thwmsim, kev siv cov ntaub ntawv jammers tau zoo tiv thaiv cov txheej txheem sim los ntawm raug nyiag los yog kaw, thiab tiv thaiv tsis pub lwm tus paub ntawm kev tshawb fawb soj ntsuam.
Kev sib tham txog kev lag luam: Hauv kev sib tham txog kev lag luam, cov tog neeg yuav pauv kev lag luam tsis pub lwm tus paub, xws li cov phiaj xwm kev lag luam, cov tswv yim ntawm tus nqi, thiab lwm yam. Yog tias cov txheej txheem kev sib tham raug kaw tsis raug cai lossis raug nyiag lawm, kev lag luam zais cia yuav raug xau, ua rau muaj kev sib koom ua lag luam. Kev siv cov ntaub ntawv jammers tuaj yeem tiv thaiv cov txheej txheem kev sib tham ua lag luam kom tsis txhob raug nyiag lossis kaw, thiab tiv thaiv kev ruaj ntseg ntawm kev lag luam secrets.
Kev tiv thaiv tus kheej ntiag tug: Hauv cov chaw pej xeem xws li cafes, tsev noj mov thiab lwm qhov chaw, kev ceev ntiag tug ntawm tus kheej feem ntau ntsib nrog kev pheej hmoo ntawm kev mloog, xws li raug nyiag los ntawm lwm tus bank card passwords, cov ntaub ntawv ntiag tug ntawm tus kheej. Kev siv cov ntawv kaw cia tuaj yeem tiv thaiv tus kheej tsis pub lwm tus paub los ntawm kev eavesdropped thiab ua kom muaj kev ruaj ntseg ntawm tus kheej.
