Unfixed-info.bin -

: The tool combines the 80-byte master key from unfixed-info.bin with the specific Amiibo’s UID and character data to derive a unique set of one-time session keys.

TagMo expects specific filenames; ensure they are not renamed to .txt or other formats.

This region contains static information that defines what the Amiibo actually is. It is permanently locked during the manufacturing process. unfixed-info.bin

In the context of Nintendo Amiibo cloning and emulation, is one of the two essential master encryption keys required to decrypt and write Amiibo data. Core Function

: The data encryption master key (80 bytes). : The tool combines the 80-byte master key from unfixed-info

You cannot perform any advanced NFC tasks without this file. It is the bridge between a raw data dump and a functional digital character.

The file is a critical encryption key required to decrypt and write Amiibo data to NFC tags. It is one of two primary key files—the other being locked-secret.bin —used by software like TagMo , AmiiboConverter , and Allmiibo . Purpose and Function It is permanently locked during the manufacturing process

Nintendo secures Amiibo chips using a mix of internal passwords and data signing. This prevents users from easily rewriting characters or maxing out stats without playing the game.

Nintendo Amiibos use encrypted NFC data. To interact with this data using third-party software, the app must "unlock" the files using specific retail keys. While the software itself is legal, these proprietary key files are copyrighted by Nintendo and are therefore not bundled with the apps. It is almost always used alongside another file called locked-secret.bin Alternative Names:

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?

Information that changes based on use, such as game-specific save data, nicknames, or leveling stats.