Hacking An interesting thought...

[IcySon55]

I was thinking about how my gold O3DSXL is on 9.5 and how shitty that is. I also know that flashing the NAND from my 9.2 O3DS wouldn't work because of per console encryption.

I had previously updated my O3DS to 9.2.0-12U using the Smash Bros Rev2 rom on my Sky3DS.

Then the idea crossed my mind, what if we could modify the Smash Bros Rev2 rom and spoof the update version to something like 9.6 or 10.1, etc...

We'd put the rom on Sky3DS and pop it into a 9.3+ system...then up-down grade it to 9.2...theoretically. This would use the consoles own encryption and get passed the problem of swapping NAND dumps. There may be safeguards against this that I'm not aware of.

Thoughts?

 

[Xenon Hacks]

I was thinking about how my gold O3DSXL is on 9.5 and how shitty that is. I also know that flashing the NAND from my 9.2 O3DS wouldn't work because of per console encryption.

I had previously updated my O3DS to 9.2.0-12U using the Smash Bros Rev2 rom on my Sky3DS.

Then the idea crossed my mind, what if we could modify the Smash Bros Rev2 rom and spoof the update version to something like 9.6 or 10.1, etc...

We'd put the rom on Sky3DS and pop it into a 9.3+ system...then up-down grade it to 9.2...theoretically. This would use the consoles own encryption and get passed the problem of swapping NAND dumps. There may be safeguards against this that I'm not aware of.

Thoughts?

Sky3ds does not play modified roms
/thread

 

[IcySon55]

Even small modifications that don't unpack/repack the rom? If at all possible, modify the version in the update partition without unpacking the rom...

 

[bache]

Even small modifications that don't unpack/repack the rom? If at all possible, modify the version in the update partition without unpacking the rom...

Any change whatsoever will break the signature, and make it unusable.

 

[DogParty]

Even small modifications that don't unpack/repack the rom? If at all possible, modify the version in the update partition without unpacking the rom...

Building on what bache said:

A ROM has a "signature" in it. That signature basically says "Every single 1 and 0 in this file is in this exact order." When the 3DS reads the game from the card, it first checks to see if that signature is correct. If so, that means the game is 100% the same as when it shipped. If not, the game has been tampered with and the 3DS won't play it. So even changing the version number from 9 (binary: 1001) to 10 (binary: 1010) would break the signature.

 

[IcySon55]

And lacking the necessary keys, we are unable to produce a newly signed rom... was worth the thought anyways.