I am working on a Windows application that lets you create flipnotes in their original format. My problem is that, even that those files seem playable, the DSi deletes them when I try to access them from the SD card, under the reason that they are corrupted. I took a closer look to the PPM format specification and learned about the RSA-1024 SHA-1 signature 144 bytes long at the end of each flipnote file. This is where I got stuck. I found on GBATEK that there is some private key that Flipnote Studio uses to sign those files and the page even provides the first 5 bytes of it, followed by "...". I also found that someone managed to find this key and created some "homebrew" flipnote files (here is the link youtube com watch?v=Ko5Pq655caY). I downloaded them to my DSi and worked like a charm. However, I failed finding this key for myself and I fell like I need some help. So... how exactly can one find the Flipnote Studio private key?
Thank you in advance!
Thank you in advance!