Amiibo | Encryption Key
Most software requires two specific files, though they are often found combined as a single file: locked-secret.bin : Used to decrypt the rewritable data on an Amiibo. unfixed-info.bin : Contains static information about the character. key_retail.bin
The Secret Key: Understanding Amiibo Encryption and the key_retail.bin amiibo encryption key
Today, the amiibo encryption key is an open secret. It’s in GitHub repos, forum posts, and NFC tool documentation. Nintendo hasn’t tried to hide it for years. Most software requires two specific files, though they