Decryption Chip waxa kale oo loo yaqaana hal-chip decryption (IC decryption).Maaddaama chips-ka kumbuyuutarka ee hal-chip-ka ah ee badeecada rasmiga ah ay yihiin kuwo sir ah, barnaamijka si toos ah looma akhrin karo iyada oo la isticmaalayo barnaamij-sameeyaha.
Si looga hortago gelitaanka aan la ogalayn ama koobiyaynta barnaamijyada on-chip-ka ee microcontroller-ka, badi koontaroolayaasha yar-yar waxay leeyihiin quful quful sir ah ama bytes sir ah si ay u ilaaliyaan barnaamijyada ku-chip-ka.Haddii xoogaa qufulka sirta ah la furo (xiran yahay) inta lagu jiro barnaamijka, barnaamijka ku jira microcontroller si toos ah uma akhrin karo barnaamije caadi ah, kaas oo loo yaqaan encryption microcontroller ama chip encryption.Weeraryahannada MCU waxay adeegsadaan qalab gaar ah ama qalab iskood u samays ah, waxay ka faa'iidaystaan daldaloolada ama cilladaha softiweerka ee naqshadeynta chip MCU, iyo iyadoo loo marayo habab farsamo oo kala duwan, waxay ka soo saari karaan macluumaadka muhiimka ah chip-ka waxayna heli karaan barnaamijka gudaha ee MCU.Tan waxaa loo yaqaan 'chip cracking'.
Habka fur furka
1.Weerarka Software-ka
Farsamadani waxay caadi ahaan isticmaashaa isgaadhsiinta isgaadhsiinta processor-ka waxayna ka faa'iidaysataa borotokoollada, algorithms-ka sireed, ama godad ammaan ee algorithms-yadan si ay weeraro u fuliyaan.Tusaalaha caadiga ah ee weerarka software-ka ee guusha leh waa weerarkii hore ee ATMEL AT89C taxane yar oo kontaroolayaal ah.Weeraryahanku waxa uu ka faa’idaystay daldaloolada ku jira qaabaynta habka hawlgalka tirtiridda ee taxanahan kombuyuutarrada yar-yar ee hal-chip ah.Ka dib markii la tirtiray xoogaa qufulka sirta ah, weeraryahanku wuxuu joojiyay hawlgalkii xigay ee lagu tirtiri lahaa xogta ku jirta xusuusta barnaamijka chip-ka, si kombuyuuterka hal-chip-ka ah ee la siray uu u noqdo microcomputer hal-chip ah oo aan qarsoodi ahayn, ka dibna u isticmaalo borogaraamiyaha si uu u akhriyo barnaamijka chip.
Iyada oo ku saleysan hababka kale ee sirta, qalabka qaar ayaa la soo saari karaa si ay ula shaqeeyaan software gaar ah si loo sameeyo weerarrada software.
2. weerarka ogaanshaha elegtarooniga ah
Farsamadani waxay caadi ahaan la socotaa sifooyinka analooga ah ee dhammaan isku xirka awoodda iyo is-dhexgalka ee processor-ka inta lagu jiro hawlgalka caadiga ah iyadoo leh xallin ku meel gaar ah oo sare, waxayna fulisaa weerarka iyadoo la soconaysa sifooyinkeeda shucaaca korantada.Sababtoo ah microcontroller waa qalab elektaroonik ah oo firfircoon, marka ay fuliso tilmaamo kala duwan, isticmaalka tamarta u dhiganta ayaa sidoo kale isbeddelaya.Sidan, adoo falanqaynaya oo ogaanaya isbeddelladan iyadoo la adeegsanayo qalabyada cabbiraadda elegtarooniga ah ee gaarka ah iyo hababka xisaabaadka, macluumaadka muhiimka ah ee gaarka ah ee kantaroolka yar ayaa la heli karaa.
3. teknoolajiyada dhalisa cilladda
Farsamadu waxay isticmaashaa xaalado shaqo oo aan caadi ahayn si ay u cilad-saarto processor-ka ka dibna waxay siisaa marin dheeraad ah si loo fuliyo weerarka.Weerarada aadka loo isticmaalo ee dhalisa cilada waxa ka mid ah korontadu kor u kacday iyo saacada oo kor u kacday.Weerarada korantada yar iyo kuwa sare waxaa loo isticmaali karaa in la joojiyo wareegyada ilaalinta ama lagu qasbo processor-ka inuu sameeyo hawlo khaldan.Ku-meel-gaadhka saacaddu waxa ay dib u dejin kartaa wareegga ilaalinta iyada oo aan la burburin macluumaadka la dhawray.Awoodda iyo saacadaha ku-meel-gaadhka ah waxay saameyn karaan dejinta iyo fulinta tilmaamaha gaarka ah ee soo-saareyaasha qaarkood.
4. Tiknoolajiyada baaritaanka
Tiknoolajiyadu waa in si toos ah loo soo bandhigo fiilooyinka gudaha ee chip-ka, ka dibna la fiirsado, la maareeyo, oo la farageliyo microcontroller si loo gaaro ujeedada weerarka.
Si loo raaxaysto awgeed, dadku waxay u qaybiyaan afarta farsamo ee kor ku xusan laba qaybood, mid waa weerar galmo (weerar jireed), weerarka noocaan ah wuxuu u baahan yahay inuu burburiyo xirmada, ka dibna la isticmaalo qalabka tijaabada semiconductor, microscopes iyo micro-positioners. shaybaadhka khaaska ah.Waxay qaadan kartaa saacado ama xitaa toddobaadyo in la dhammaystiro.Dhammaan farsamooyinka microprobing waa weerarro weerar ah.Saddexda hab ee kale waa weerarro aan duullaan ahayn, koontaroolka yar ee la weerarayna ma dhaawacmi doono jir ahaan.Weerarada aan qarsoodiga ahayn ayaa si gaar ah khatar u ah xaaladaha qaarkood sababtoo ah qalabka loo baahan yahay weerarrada aan fiicneyn ayaa inta badan iskood u dhisan kara oo la cusboonaysiin karaa, sidaas darteedna aad u jaban.
Inta badan weerarrada aan soo dhex galeynin waxay u baahan yihiin qofka wax weeraraya inuu leeyahay aqoon processor oo wanaagsan iyo aqoonta software.Taas bedelkeeda, weerarrada baaritaanka soo gelaya uma baahna aqoon bilow ah, iyo farsamooyin badan oo la mid ah ayaa sida caadiga ah loo isticmaali karaa noocyo kala duwan oo badeecooyin ah.Sidaa darteed, weerarrada lagu qaado microcontrollers waxay inta badan ka bilaabmaan injineernimada dib-u-soo-celinta, iyo waayo-aragnimada la ururiyey waxay gacan ka geysaneysaa horumarinta farsamooyinka weerarka ee jaban oo degdeg ah.