Distinguishes between a figure, card, or yarn plush. The Role of HMAC and Key Generation
It's important to note that you will often see these files referred to with the prefix "retail", as in Have retail unfixed keys or Have retail locked keys in the TagMo UI. This indicates that the keys are from retail, Nintendo-produced hardware. The use of the word "key" suggests these are not generic files but are specific cryptographic components that must be kept secure. For this reason, they are almost never included with the modding tools themselves. Users are typically expected to source them independently for legal and security reasons.
To get started, you will need to place three types of files on your Android device (typically in a folder like Downloads or a dedicated Amiibo folder): unfixed-info.bin
The data master key from unfixed-info.bin is used to derive several Amiibo-specific data keys. These child keys are then responsible for:
Creating backups of Amiibos you legally own for personal use falls into a legal gray area in many regions, whereas downloading Amiibo dumps online for figures you do not own is piracy. Distinguishes between a figure, card, or yarn plush
Amiibo use NTAG215 chips with specific encryption to prevent unauthorized copying.
Popular open-source tools—such as (for Android), AmiiBomb (for PC), and various flipper or microcontroller scripts—allow users to back up their physical Amiibo collections or write backup files (.bin files) to blank NTAG215 tags. The use of the word "key" suggests these
One of the most common issues users encounter with unfixed-info.bin is the "Key file signature does not match" error. This error is almost always a result of one of the following:
Unfixed-info.bin: The Technical Key to Amiibo Customization and Emulation