Purpose: write Megamos 48 component security Component Security in Megamos 48 key The modern immobilizers of the VAG-group vehicles have such conception as “Component Security” (CS). The CS is an array of 7 bytes length. Its role in a vehicle is to forbid a mixing of electronic units from different cars. In terms of the immobilizer the CS is a “password” that used in couple of the Motor Unit (ECU) and the immobilizer. The protection scheme includes 3 components that share the CS, they are: ECU IMMO KEY The protection scheme allows the engine to start only in case when the CS is identical in all the three components. Key and CS The CS is a part of the Crypto Key and fills its upper area Word9-Word6. ECU and CS ECU uses the CS as a password. More modern ECUs contain only 6 bytes of the CS. In this case the CS should be extracted from another devices, for example it may be a dashboard. IMMO and CS The vehicle dashboard usually has a role of an immobilizer. The I...
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