Nti decryption tseem hu ua ib-nti decryption (IC Decryption). Txij li thaum ib leeg-nti microcomputer chips nyob rau hauv cov khoom lag luam yog encrypted, qhov kev zov me nyuam tsis tuaj yeem nyeem ncaj qha siv tus programmer.
Txhawm rau tiv thaiv kev tsis tau tso cai lossis luam tawm cov kev pab cuam ntawm cov microcontroller lossis cov microcontroller, feem ntau cov microcontroller, encrypted bytes los tiv thaiv cov kev pab cuam on-chip. Yog tias lub encryption kaw me ntsis yog qhib (muab xauv) thaum lub sijhawm ua haujlwm tsis ncaj ncees, uas yog hu ua microController encryption encryption lossis nti encryption. MCU cov neeg tua siv siv cov cuab yeej tshwj xeeb lossis cov cuab yeej siv tus kheej, lawv tuaj yeem rho tawm cov ntaub ntawv lossis cov ntaub ntawv nthuav tawm los ntawm lub nti thiab tau txais cov txheej txheem sab hauv MCU ntawm MCU. Qhov no yog hu ua nti tawg.
Nti decryption txoj kev
1.Software tawm tsam
Cov txheej txheem no feem ntau siv cov kev sib txuas lus kev sib txuas lus thiab siv cov kev cai, lossis cov kev ruaj ntseg hauv cov algorithms los ua cov kev tawm tsam. Ib qho piv txwv ntawm kev ua tiav software kev vam meej yog kev tawm tsam rau thaum ntxov athon at89c series microcontrollers. Tus neeg tawm tsam coj kom zoo dua ntawm lub loopholes hauv kev tsim ntawm kev lwv cov haujlwm ua ntu zus ntawm cov lej ntawm no ntawm ib leeg microcomputers. Tom qab lwv tawm lub encryption kaw me ntsis, yog li encrying ib qho kev nkag siab, thiab tom qab ntawd siv tus programmer nyeem cov lej ntawm-Chip.
Ntawm cov hauv paus ntawm lwm cov kev siv encryptions, qee cov khoom siv tuaj yeem tsim kho kom muaj kev koom tes nrog qee yam software tawm tsam.
2. Kev Tshawb Nrhiav Hluav Taws Xob
Cov txheej txheem no yog saib xyuas cov yam ntxwv ntawm lub zog thiab kev ua haujlwm hauv lub sijhawm ua haujlwm siab hauv lub cev, thiab cuam tshuam kev tawm tsam ntawm cov khoom siv hluav taws xob hauv hluav taws xob. Vim tias microcontroller yog cov khoom siv hluav taws xob hluav taws xob ua haujlwm, thaum nws ua tiav cov lus qhia sib txawv, kev siv fais fab sib piv kuj hloov pauv. Nyob rau hauv txoj kev no, los ntawm kev tshuaj xyuas thiab tshawb xyuas cov kev hloov no siv hluav taws xob ntsuas ntsuas thiab cov lus qhia kev ua lej, cov ntaub ntawv tseem ceeb hauv lub microcontroller tuaj yeem tau txais.
3. Txhaum tiam thev naus laus zis
Cov txheej txheem no siv cov haujlwm txawv txav rau kab laum thiab tom qab ntawd muab kev nkag mus ntxiv los ua kev tawm tsam. Qhov kev ua txhaum ntau tshaj plaws siv-tsim tawm kev tawm tsam muaj xws li voltage surges thiab moos surges. Tsawg-voltage thiab high-voltage kev tawm tsam tuaj yeem siv los ua kom muaj kev tiv thaiv kev tiv thaiv lossis yuam cov processor ua haujlwm yuam kev. Moos cov khoom tuaj yeem hloov chaw tiv thaiv kev tiv thaiv yam tsis muaj kev tiv thaiv cov ntaub ntawv tiv thaiv. Lub Hwj Chim thiab Cov Poos Los Hloov tuaj yeem cuam tshuam lub cim thiab ua tiav ntawm tus kheej cov lus qhia hauv qee cov txheej txheem.
4. Kev sojntsuam technology
Cov thev naus laus zis yog txhawm rau nthuav tawm sab hauv ntawm lub nti, thiab tom qab ntawd saib, tswj, thiab cuam tshuam nrog lub microcontroller kom ua tiav lub hom phiaj ntawm kev tawm tsam.
Rau qhov ua kom yooj yim, cov tib neeg faib cov txheej txheem sib tw ua kom puas (thiab maj mam siv cov khoom siv kuaj cov khoom, kev tawm dag zog thiab cov khoom siv micro tsho sib txuas. Nws tuaj yeem siv sijhawm lossis txawm tias lub lim tiam ua tiav. Txhua cov lus qhia micropbleing yog qhov kev tawm tsam tsis zoo. Lwm qhov peb txoj hauv kev tsis yog kev tawm tsam tsis muaj kev cuam tshuam, thiab cov kabmob microcontroll yuav tsis yog lub cev puas. Cov kev tawm tsam tsis muaj kev phom sij nyob rau qee kis vim tias cov cuab yeej siv tau ua rau kev tawm tsam tus kheej thiab hloov kho tus kheej, thiab yog li pheej yig.
Feem ntau cov kev tawm tsam feem ntau tsis xav kom tus tawm tsam kom muaj cov txheej txheem zoo paub thiab kev paub software. Hauv kev sib piv, kev sojntsuam tsis txaus siab tsis tas yuav muaj kev paub ntau, thiab cov txheej txheem dav ntawm cov tswv yim sib xws feem ntau tuaj yeem siv tawm tsam ntau yam khoom. Yog li ntawd, kev tawm tsam ntawm microcontrollers feem ntau pib los ntawm kev rov qab nkag siab, thiab cov kev ua tau zoo dua yuav pab tsim cov txheej txheem pheej yig dua thiab nrawm dua.
