Chip decryption tseem hu ua single-chip decryption (IC decryption).Txij li cov chips microcomputer ib leeg hauv cov khoom lag luam raug encrypted, qhov kev pab cuam tsis tuaj yeem nyeem ncaj qha siv tus programmer.
Txhawm rau tiv thaiv kev nkag mus tsis raug cai lossis luam tawm ntawm cov kev pabcuam hauv-chip ntawm microcontroller, feem ntau cov microcontrollers tau encrypted xauv cov khoom lossis encrypted bytes los tiv thaiv cov kev pabcuam ntawm-chip.Yog tias qhov encryption xauv me ntsis tau qhib (xauv) thaum lub sijhawm ua haujlwm, qhov kev zov me nyuam hauv microcontroller tsis tuaj yeem nyeem ncaj qha los ntawm ib tus programmer, uas yog hu ua microcontroller encryption lossis nti encryption.MCU cov neeg tawm tsam siv cov cuab yeej tshwj xeeb lossis cov cuab yeej tsim los ntawm tus kheej, siv qhov khoob lossis cov software tsis xws luag hauv MCU chip tsim, thiab los ntawm ntau yam kev siv, lawv tuaj yeem rho tawm cov ntaub ntawv tseem ceeb ntawm lub nti thiab tau txais cov kev pabcuam sab hauv ntawm MCU.Qhov no hu ua chip cracking.
Chip decryption txoj kev
1.Software Attack
Cov txheej txheem no feem ntau siv cov txheej txheem sib txuas lus sib txuas lus thiab siv cov txheej txheem, encryption algorithms, lossis qhov chaw ruaj ntseg hauv cov algorithms los tawm tsam.Ib qho piv txwv ntawm kev ua tiav software nres yog kev tawm tsam ntawm ATMEL AT89C series microcontrollers thaum ntxov.Tus neeg tawm tsam tau coj kom zoo dua ntawm qhov tsis txaus ntseeg hauv kev tsim qauv ntawm kev tshem tawm cov haujlwm ua ntu zus ntawm no series ntawm ib leeg-chip microcomputers.Tom qab tshem tawm lub kaw lus zais me ntsis, tus neeg tawm tsam nres qhov kev ua haujlwm tom ntej ntawm kev tshem tawm cov ntaub ntawv hauv lub cim xeeb ntawm lub khoos phis tawj, kom lub cim xeeb ib leeg-chip microcomputer dhau los ua Unencrypted ib leeg-chip microcomputer, thiab tom qab ntawd siv tus programmer los nyeem cov on- chip program.
Raws li lwm txoj hauv kev encryption, qee cov cuab yeej tuaj yeem tsim los koom tes nrog qee yam software los ua software tawm tsam.
2. hluav taws xob tshawb nrhiav nres
Cov txheej txheem no feem ntau saib xyuas cov yam ntxwv analog ntawm txhua lub zog thiab kev sib txuas ntawm lub processor thaum lub sijhawm ua haujlwm ib txwm muaj kev daws teeb meem ntawm lub cev, thiab siv qhov kev tawm tsam los ntawm kev saib xyuas nws cov yam ntxwv hluav taws xob hluav taws xob.Vim hais tias lub microcontroller yog ib qho khoom siv hluav taws xob nquag, thaum nws ua tiav cov lus qhia sib txawv, kev siv hluav taws xob sib txuas kuj hloov raws li.Nyob rau hauv txoj kev no, los ntawm kev txheeb xyuas thiab txheeb xyuas cov kev hloov pauv no siv cov cuab yeej hluav taws xob tshwj xeeb ntsuas thiab cov txheej txheem lej, cov ntaub ntawv tseem ceeb hauv microcontroller tuaj yeem tau txais.
3. txhaum tiam technology
Cov txheej txheem siv cov kev ua haujlwm txawv txav mus rau kab laum processor thiab tom qab ntawd muab kev nkag mus ntxiv los ua qhov kev tawm tsam.Feem ntau siv kev ua txhaum kev tawm tsam muaj xws li voltage surges thiab moos surges.Tsawg-voltage thiab high-voltage tawm tsam yuav siv tau los lov tes taw tiv thaiv circuits los yog yuam kom lub processor ua yuam kev.Lub moos hloov pauv tuaj yeem rov pib dua qhov kev tiv thaiv Circuit Court yam tsis tau rhuav tshem cov ntaub ntawv tiv thaiv.Lub hwj chim thiab moos hloov pauv tuaj yeem cuam tshuam rau kev txiav txim siab thiab ua tiav cov lus qhia ntawm tus kheej hauv qee cov txheej txheem.
4. kev sojntsuam technology
Cov thev naus laus zis yog txhawm rau nthuav tawm cov kab hluav taws xob sab hauv ntawm lub nti, thiab tom qab ntawd saib, tswj xyuas, thiab cuam tshuam nrog microcontroller kom ua tiav lub hom phiaj ntawm kev tawm tsam.
Txhawm rau kom yooj yim, tib neeg faib cov plaub hau kev tawm tsam saum toj no rau hauv ob pawg, ib qho yog kev tawm tsam (kev tawm tsam lub cev), hom kev tawm tsam no yuav tsum ua kom puas lub pob, thiab tom qab ntawd siv cov khoom siv kuaj semiconductor, microscopes thiab micro-positioners hauv ib qho. chav kuaj tshwj xeeb.Nws tuaj yeem siv sij hawm los yog ntau lub lis piam kom tiav.Tag nrho cov txheej txheem microprobing yog kev tawm tsam.Lwm peb txoj kev yog kev tawm tsam uas tsis muaj kev tawm tsam, thiab lub microcontroller raug tua yuav tsis raug puas tsuaj rau lub cev.Kev tawm tsam uas tsis muaj kev cuam tshuam yog qhov txaus ntshai tshwj xeeb hauv qee kis vim tias cov cuab yeej xav tau rau kev tawm tsam tsis muaj kev cuam tshuam feem ntau tuaj yeem ua tus kheej tsim thiab kho dua tshiab, thiab yog li pheej yig heev.
Feem ntau cov kev tawm tsam uas tsis muaj kev cuam tshuam xav tau tus neeg tawm tsam kom muaj kev paub zoo ntawm processor thiab kev paub txog software.Nyob rau hauv sib piv, invasive sojntsuam tawm tsam tsis xav tau ntau yam pib paub, thiab ib tug dav txheej txheem zoo sib xws feem ntau yuav siv tau tawm tsam ntau yam khoom.Yog li ntawd, kev tawm tsam ntawm microcontrollers feem ntau pib los ntawm intrusive thim rov qab engineering, thiab cov kev paub ntau ntxiv pab tsim cov txheej txheem pheej yig dua thiab nrawm dua uas tsis muaj kev cuam tshuam.