The file is a specific data component primarily associated with the Mifare Premium (Amiibo) emulation community. If you have encountered this file, you are likely venturing into the world of backing up or spoofing NFC tags for gaming consoles like the Nintendo Switch, 3DS, or Wii U.
Users must navigate to settings and select "Load Key(s) File" to import both unfixed-info.bin and locked-secret.bin .
Every Amiibo contains encrypted data stored on an internal NFC chip. To prevent piracy and unauthorized modifications, Nintendo secures this data using a two-part cryptographic key system. The decryption process requires two specific binary files:
: In some modern apps, these two files are merged into a single file often named key_retail.bin . Why You Need It unfixed-info.bin
TagMo expects specific filenames; ensure they are not renamed to .txt or other formats.
Handles the decryption of the data that the console writes to the tag.
It works alongside locked-secret.bin , which handles the "locked" data (UID, Amiibo type). Why Do You Need It? The file is a specific data component primarily
The data will then be written to the tag, creating a functional Amiibo clone.
: It is used to derive specific data keys for signing and encrypting dynamic information like the Amiibo name , owner details , and in-game progress .
Once loaded, TagMo will show that keys are registered, allowing you to load Amiibo dumps ( .bin files) and write them to NFC tags. Every Amiibo contains encrypted data stored on an
If you have encountered an unfixed-info.bin in a unique or unexplained location, consider sharing your findings on tech forums like Stack Overflow or Reddit’s r/techsupport—your experience may help decode this digital curiosity once and for all.
unfixed-info.bin is one of two essential encryption keys (the other being locked-secret.bin ) required by applications like to decrypt and write Amiibo data to blank NTAG215 NFC tags. Purpose and Functionality Decryption Key
Some older versions of software specifically look for unfixed-info.bin (with a hyphen) while others look for unfixed_info.bin (with an underscore). Check your app’s documentation to see which naming convention it prefers. Legal and Ethical Note
Ensure the files are exactly 80 bytes each.