Feem ntau hais lus, muaj qhov encryption authentication nti ntawm PCB, ntxiv rau qee qhov yooj yim circuits, thiab tib lub sij hawm thauj khoom los tiv thaiv tub sab nyiag algorithms los tiv thaiv cov ntaub ntawv sab hauv ntawm lub nti los ntawm raug nyiag, nws yog hu ua chip encryption technology. Lub sijhawm no, thaum lub kaw lus zais me ntsis raug kaw thaum lub sijhawm ua haujlwm, tus programmer zoo tib yam tsis tuaj yeem nyeem ncaj qha rau qhov program hauv lub nti, uas ua lub luag haujlwm tiv thaiv.
Raws li cov ntaub ntawv sib txawv encryption schemes thiab siv txoj kev, nws tuaj yeem muab faib ua ob hom encryption chips
Ib qho yog authentication hom encryption nti, thiab nws qhov zoo dua yog kev ruaj ntseg ntawm encryption nti kev pabcuam platform, kev sib koom ua ke algorithm, thiab kev siv yooj yim. Qhov tsis zoo Qhov kev nyab xeeb tag nrho yog qhov tsawg, thiab kev tiv thaiv ntawm lub ntsiab tswj MCU tsis muaj zog. Nws tau raug lees paub tias muaj kev ruaj ntseg tsis zoo. Lub nti encryption tuaj yeem tawg tau yooj yim los ntawm kev tawm tsam MCU.
Lwm qhov yog encryption nti ntawm lub ntse nti kev pabcuam platform, uas siv cov algorithms thiab cov ntaub ntawv hloov chaw daws teeb meem. Ib feem ntawm cov kev pab cuam thiab ib feem ntawm cov ntaub ntawv ntawm lub ntsiab tswj MCU yog hloov mus rau lub encryption nti kom khiav. Lub nti encryption yog siv los ua kom tiav cov haujlwm uas ploj lawm ntawm MCU thaum lub sijhawm ua haujlwm, thaum ua kom muaj kev nyab xeeb ntawm qee qhov kev pabcuam thiab ua kom muaj kev nyab xeeb ntawm tag nrho cov khoom.
Dab tsi yog chip encryption technologies
1. Sib tsoo cov nti, siv cov ntawv xuab zeb zoo los zom tawm cov qauv tshwj xeeb ntawm cov nti. Nws yog qhov tseem ceeb tshaj rau cov chips tsis nrov. Rau cov chips nquag, koj tsuas yog yuav tsum twv seb qhov kev ua haujlwm dav dav, tshawb xyuas cov av ntawm tus pin thiab txuas cov khoom siv hluav taws xob, thiab nws yooj yim los sib piv cov nti tiag.
2. Sealing kua nplaum, lub pob zeb zoo li cov kua nplaum (xws li cov hlau nplaum, ceramics) tom qab solidification yuav npog tag nrho cov khoom ntawm PCB. Nyob rau tib lub sijhawm, cov xov hlau sab hauv raug cuam tshuam thiab sib tw ua ke nrog cov xov hlau nyias nyias, yog li cov xov hlau ya tau yooj yim tawg thaum cov kua nplaum raug tshem tawm, thiab tsis paub txog kev sib txuas. Cov teeb meem xav tau kev saib xyuas Cov kua nplaum yuav tsum tsis txhob corrosive, thiab qhov kub thiab txias ntawm qhov chaw kaw f tsis loj.
3. Porting ib feem ntawm qhov kev pab cuam nyob rau hauv CPU los yog software rau lub encryption nti, ua rau cov kev pab cuam tsis tiav, thiab nws muaj peev xwm khiav ib txwm nrog kev koom tes ntawm lub encryption nti. Muab DES, 3DES encryption thiab decryption functions.
4. Npuag nti, tuaj yeem' tsis pom tus qauv specification thiab tsis txhob' tsis paub qhov thaiv. Nyob rau tib lub sijhawm, kev ua haujlwm ntawm lub nti tsis yooj yim los twv. Muab lwm yam rau hauv cov yas, xws li cov ICs me me, cov resistors, thiab lwm yam.
5. Txuas qhov tsis kam ntawm 60 ohms los yog ntau tshaj nyob rau hauv series ntawm cov teeb liab kab uas tsis muaj tam sim no (kom lub on-off iav ntawm lub multimeter tsis suab), uas yuav ua rau kom muaj teeb meem ntau thaum siv lub multimeter los ntsuas qhov kev sib raug zoo .
5. Txuas lub resistor siab tshaj 60 ohms nyob rau hauv series ntawm lub hwj chim kab nrog ib tug me me ntawm tam sim no (kom lub digital multimeter nyob rau hauv thiab tawm), uas yuav ua rau kom lub inconveniences thaum siv lub multimeter digital los kuaj kev sib txuas.
6. Siv qee cov khoom me me nrog cov npe tsis zoo los koom nrog hauv kev ua cov teeb liab, xws li cov nti me me capacitors, TO-XX diodes, chips me me nrog peb mus rau rau tus pins, thiab lwm yam, uas ua rau muaj kev nyuaj siab nrhiav qhov tseeb ntawm cov khoom siv. .
7. Chaw nyob lossis cov ntaub ntawv kab hla (tshwj tsis yog RAM, tus ntoo khaub lig sib raug yog yuav tsum tau muaj nyob rau hauv software), uas ua rau nws tsis yooj yim sua kom kos inferences txog kev sib raug zoo ntawm sab kev sib raug zoo thiab ua rau muaj kev nyuaj ntawm kev ua haujlwm.
8. PCB xaiv faus ntawm thiab qhov muag tsis pom kev ntawm kev siv tshuab, kom cov viav vias tau muab zais rau hauv lub rooj tsavxwm. Txoj kev no muaj tus nqi siab dua thiab tsim nyog rau cov khoom siv high-end.
9. Siv lwm cov cuab yeej txhawb nqa tshwj xeeb, xws li kev hloov kho LCD npo, hloov pauv hloov pauv, SIM daim npav, encrypted hard disk, thiab lwm yam.