How is the firmware encrypted?

I downloaded the firmware for my cellphone frome somewhere.
I have successfully decompressed the archive (as it was
compressed with a popular file compressor) and got the
ready to use flash file.
However when I tried to look into it (I just wanted to
do a reverse engineering of that) I found a complete
rubbish. It seems to me that flash files are encrypted
or scrambled. How can I get the phone's CPU machine code
out of the flash file?

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An Metet <[email protected]> wrote in message news:<[email protected]>...
> I downloaded the firmware for my cellphone frome somewhere.
> I have successfully decompressed the archive (as it was
> compressed with a popular file compressor) and got the
> ready to use flash file.
> However when I tried to look into it (I just wanted to
> do a reverse engineering of that) I found a complete
> rubbish. It seems to me that flash files are encrypted
> or scrambled. How can I get the phone's CPU machine code
> out of the flash file?

What software are you using to disassemble the code ? I assume you're
not trying to read pure machine code....

An Metet <[email protected]> wrote in message news:<[email protected]>...
> I downloaded the firmware for my cellphone frome somewhere.
> I have successfully decompressed the archive (as it was
> compressed with a popular file compressor) and got the
> ready to use flash file.
> However when I tried to look into it (I just wanted to
> do a reverse engineering of that) I found a complete
> rubbish. It seems to me that flash files are encrypted
> or scrambled. How can I get the phone's CPU machine code
> out of the flash file?

What software are you using to disassemble the code ? I assume you're
not trying to read pure machine code....