BB5 SECURITY SYSTEM
1. security certificate stored at the CMT flash + RAP3G & security simlock CMT areas will also be stored in flash, and RAP3G
When a corrupted or missing NPC (nokia public certificate) or simlock data will have a contact phone retailer, or restart
it is because because of data entered into the memory had previously been through an encryption process based on the algo from NPC and simlock data.!!
so if one replaced the security authentication process to be wrong.
2. when RAP3G and NOR flash (CMT flash) mounted together (with provisions RAP3G and CMT flash from normal HP), the encryption key will be matched with at RAP3G security area on the flash and the phone will be normal.!
This exact same process on the security system platform 4 hp (DCT4 & WD2). if UEM and FLASH on the same encryption key pairs will be matched.
* Encryption key will be sent to the logic system certificate who is in the OTP system. if true, then the encryption key will be lit with a normal HP.
DIFFERENCES IN SECURITY PLATFORM 4 (DCT4 & WD2) and BASE BAND 5 (BB5)
security system platform 4. logic using a metronome or delay in the voltage or can call (flip - flop logic voltage) / watchdog. so if one replaced (UEM or FLASH), so the process of security and authentication into one processor will perform calculations based on the RPL. if processors find untruth encryption key calculation she will do shutsdown system
but differ in the security system BASE BAND 5 (BB5)
flip-flop logic there is no voltage if the encryption key and flash RAP3G different / not match then the HP will not experience 30 seconds of death (watchdog), the problem lies not in place its security in the power management logic.
Understanding PROBLEM SX4 or PM AUTHOR:
SX-4 algorithm for storing decrypted process in / out in the programming of data into the phone, this protection algorithm can only be taken by dump on security RAP3 and CMT flash.
if we do read full PM (permanent memory) on BB5 illuminating the SX4 does not come to capture ..!!!!
From the above explanation we'd have to know how to repair BB5 without doing SX4 ....
BB5 repair and illuminating without the SX4 has been avaible...