iPhone 4, Nand is encrypted?

Hi everyone,

I've an iPhone 4 locked in a boot loop .. And if I try to update this one with iTunes an error 9 occurs. (At the beginning of update, progress bar under apple logo, this fu***** iPhone restart and go to restore mode).

So the question is always the same .. How I can retrieve the data into the nand ? I know all recent iPhone are encrypted with CPU and other chips on logic board. But the “recent" iPhone have a secure enclave, the data security is extremely important.

I've bought some iCloud locked logic board for try to change cpu, nand, baseband cpu, baseband memory and pay chip. But I don't have a good result ..

It's possible to read the data into the nand with a flash reader on a iPhone 4 ? Or no, the data are encrypted ?

Thanks!