DCT4 Flash editing :)

[slikmik]

Ok now with a DCT3 flash as we all know we can open in hex and see easy resemblances to text and stuff, and do lame thingies such as change text (as a basic mod)

Ok now i opened up a DCT4 flash and its like got NO text in it - im scared

Is it all encryptied? Any way to edit text in it or decipher it??

If there is then i'll have the checksums to worry about yay

Mike

[wfc]

i opened up a 8310 flash in winarm and had a bit of a read through the asm code. i could see certain workings but i got a bit lost with out jotting down notes as i went through it. but your right there is no bitmaps or anything else visually recognisable. I guess it just means that they are usuing a more efficient method of coding the pictures in. Not forgetting that there is probably a shitload of encryption.

[kaos]

All DCT4 flashes (mcu+ppm) seems to be encrypted or compressed. (except 7210ppm)
Also seems to bee doing its decrypting by hardware.


Correct me if im wrong!!!

Anybody knows anything about DCT4 encryption???

[h_r_f]

So it seems that Nokia thought
-Hmm DCT3, too many people making too much money out of modding, unlocking, screwing with etc
-We'll make DCT4! and encrypt everything, mwah ha ha haaa
-But won't the modders read thru the code and get the decryption method, and use our code each time they wanna decrypt?
-Oh yes, we'll spend millions on implementing hardware to do it mwaa ha ha hhaa (again)

h_r_f thinks:
bugga, even the software probably doesn't know about the encryption.

Does anybody have hardware tracing utilities and logic analysers to see what happens when say, the phone saves a text message to memory or reads an image.
But I expect the decryption is on the same chip that the arm processor is on...

Does anyone know whos currently cracking the encryption?
^ Stupid question ^ Nokia will kill them