Chip decryption izwi kandi nka chip-decryption imwe (IC decryption). Kubera ko chip imwe ya chip ya microcomputer yibicuruzwa byemewe byabitswe, porogaramu ntishobora gusomwa neza ukoresheje porogaramu.
Kugirango wirinde kwinjira cyangwa gukoporora porogaramu zitemewe kuri microcontroller, microcontrollers nyinshi zifunze bits cyangwa zifunze bytes kugirango zirinde porogaramu kuri chip. Niba encryption lock bit ishoboye (ifunze) mugihe cyo gutangiza porogaramu, porogaramu muri microcontroller ntishobora gusomwa mu buryo butaziguye na porogaramu isanzwe, ibyo bita microcontroller encryption cyangwa chip encryption. Abateye MCU bakoresha ibikoresho byihariye cyangwa ibikoresho byakozwe ubwabo, bagakoresha icyuho cyangwa inenge za software mugushushanya chip ya MCU, kandi binyuze muburyo butandukanye bwa tekiniki, barashobora gukuramo amakuru yingenzi muri chip bakabona gahunda yimbere ya MCU. Ibi byitwa chip cracking.
Uburyo bwo kubeshya
1.Igitero cya software
Ubu buhanga busanzwe bukoresha interineti itumanaho kandi bukoresha protocole, ibanga rya algorithms, cyangwa umwobo wumutekano muri iyi algorithm kugirango ugabe ibitero. Urugero rusanzwe rwigitero cya software ni igitero kuri microcontrollers ya mbere ya ATMEL AT89C. Igitero cyifashishije icyuho mugushushanya ibikorwa byo gusiba bikurikirana byuruhererekane rwa microcomputer imwe. Nyuma yo guhanagura ibanga rya enterineti, uwagabye igitero yahagaritse igikorwa gikurikira cyo gusiba amakuru muri memoire ya progaramu ya chip, kugirango microcomputer ihishe imwe ihita iba microcomputer, hanyuma ikoreshe porogaramu kugirango usome kuri- porogaramu ya chip.
Ukurikije ubundi buryo bwo kugenzura, ibikoresho bimwe birashobora gutezwa imbere kugirango bifatanye na software runaka kugirango ikore ibitero bya software.
2. igitero cya elegitoroniki
Ubu buhanga busanzwe bukurikirana ibintu bisa nimbaraga zose hamwe ninteruro ihuza itunganywa mugihe gikora gisanzwe hamwe nicyemezo cyigihe gito, kandi igashyira mubikorwa igitero ikurikirana ibiranga imirasire ya electronique. Kuberako microcontroller nigikoresho cya elegitoroniki ikora, iyo ikora amabwiriza atandukanye, ingufu zikoreshwa nazo zirahinduka. Muri ubu buryo, mu gusesengura no kumenya izi mpinduka ukoresheje ibikoresho byihariye byo gupima ibikoresho bya elegitoronike hamwe nuburyo bwo kubara imibare, amakuru yingenzi muri microcontroller arashobora kuboneka.
3. tekinoroji yo kubyara amakosa
Tekinike ikoresha uburyo budasanzwe bwo gukora kugirango ikosore hanyuma itange ubundi buryo bwo kugaba igitero. Ibitero bikoreshwa cyane bitera amakosa harimo voltage yogukoresha hamwe nisaha. Ibitero bito bito na voltage nyinshi birashobora gukoreshwa muguhagarika imiyoboro yo gukingira cyangwa guhatira utunganya gukora ibikorwa bibi. Abatwara amasaha barashobora gusubiramo uruzinduko rwo kurinda badasenya amakuru arinzwe. Imbaraga nisaha birashobora guhindura decoding no gushyira mubikorwa amabwiriza kugiti cye.
4. tekinoroji
Ikoranabuhanga nuguhishura byimazeyo insinga zimbere za chip, hanyuma ukareba, gukoresha, no kubangamira microcontroller kugirango ugere kuntego yo gutera.
Kugirango byorohe, abantu bagabanya tekinike enye zavuzwe haruguru mubice bibiri, kimwe nigitero cyinjira (igitero cyumubiri), ubu bwoko bwibitero bugomba gusenya paki, hanyuma bagakoresha ibikoresho byo gupima semiconductor, microscopes na micro-posisiyo muri a laboratoire yihariye. Birashobora gufata amasaha cyangwa ibyumweru kugirango birangire. Tekinike zose za microprobing nibitero bitera. Ubundi buryo butatu nibitero bidatera, kandi microcontroller yibasiwe ntabwo yangiritse kumubiri. Ibitero bidahwitse birashobora guteza akaga cyane mubihe bimwe na bimwe kuko ibikoresho bisabwa mubitero bitagutera akenshi birashobora kwiyubaka no kuzamurwa, bityo bikaba bihendutse cyane.
Ibitero byinshi bidahwitse bisaba uwateye kugira ubumenyi bwiza bwo gutunganya no kumenya software. Ibinyuranyo, ibitero byubushakashatsi ntibisaba ubumenyi bwambere, kandi uburyo bunini bwubuhanga bushobora gukoreshwa muburyo butandukanye bwibicuruzwa. Kubwibyo, ibitero byibasiye microcontrollers akenshi bitangirira kubikorwa byubuhanga bwinjira, kandi uburambe bwakusanyije bufasha guteza imbere tekinike ihendutse kandi yihuse idahwitse.