The data master key from unfixed-info.bin is used to derive several Amiibo-specific data keys. These child keys are then responsible for:
Disclaimer: This guide is for educational purposes. If you are modifying system files, ensure you have a NAND backup.
: This happens if the file was downloaded incorrectly or corrupted during transfer. The file size must be exactly 160 bytes. unfixed-info.bin
| Aspect | Assessment | |---------------------------|-----------------------------------------------------------------------------| | | Low to None | | Likely Origin | JetBrains IDE, Android Studio, game mod loaders, or recovery software | | Can you delete it? | Yes, in almost all circumstances | | Will deletion break anything? | No, unless you are mid-recovery or mid-debug session | | Malware probability | <2% (only if found in abnormal directory with suspicious extensions) |
The files are named exactly unfixed-info.bin and locked-secret.bin (all lowercase, matching extensions). The data master key from unfixed-info
Because the UID is unique to every single physical tag, the cryptographic signature changes for every Amiibo—even if they represent the exact same character. Software tools use unfixed-info.bin to decipher how the unique hardware UID interacts with the standard character data. Common Use Cases and Applications
This allows you to inspect the file headers and search for text strings hidden in the binary code. 2. Specialized Emulators or Flashing Tools : This happens if the file was downloaded
: A HMAC-SHA256 signature check runs concurrently. If the signature derived from the data matches the signature on the chip, the software confirms the file is authentic and uncorrupted.
Understanding how unfixed-info.bin works requires diving into the structural anatomy of an Amiibo, the mathematics behind its encryption, and the practical steps needed to use it for custom NFC tag creation. The Anatomy of Amiibo Encryption
Raw data extracted directly from a cartridge, console chip, or smart device.