Unfixed-info.bin Jun 2026

Without these keys, standard NFC writing apps cannot read the encrypted contents of an Amiibo .bin dump or properly format a blank tag to be recognized by a Nintendo console. Key Components for Amiibo Cloning:

The term "unfixed" is engineering jargon, not a value judgment. It means: "Information that was detected during pre-installation checks but could not be automatically rectified without overwriting user preferences or risking instability."

You’re digging through your system drive, clearing space for that new game or AI model. Everything looks normal—until you see it. A lone file, sitting in a folder you don’t remember creating. The name?

The filenames of the key files (unfixed vs. locked) directly correspond to the type of data they are meant to secure. The unfixed-info.bin file handles the variable information. unfixed-info.bin

Is it true? Almost certainly not. But it’s a great story.

Sometimes, developers and homebrew users combine these two 80-byte fragments into a single, cohesive 160-byte file known as key_retail.bin using a simple command-line merge: cat unfixed-info.bin locked-secret.bin > key.bin Use code with caution. Why Is unfixed-info.bin Required?

Let’s open the rabbit hole.

: This file contains data patterns used to decode the unique, non-static parts of the Amiibo chip.

Nintendo uses a customized version of the (Hash-based Message Authentication Code) algorithm. When a console reads an Amiibo, it takes the static data from the locked region, mixes it with the unique UID from the unfixed region, and passes them through a key derivation function using the constants found inside unfixed-info.bin and locked-secret.bin .

Ensure that both files are present in the same directory. Many applications expect them to be separate files named exactly unfixed-info.bin and locked-secret.bin . Other programs require you to concatenate them into a single 240-byte file named key_retail.bin . "Invalid File Size" Check the file properties of your keys. unfixed-info.bin must be exactly . Without these keys, standard NFC writing apps cannot

For example:

unfixed-info.bin is a system resource file used by the Nintendo 3DS operating system (HOME Menu/System Settings).

: This occurs when the file is incorrectly named or placed in the wrong directory. Ensure the filename is entirely lowercase. Everything looks normal—until you see it

AMD Adrenalin has a unique update mechanism. When you install or update your graphics drivers, the software performs a multi-phase integrity check: