Enctitlekeysbin 3ds Top 2021 -

It is required to decrypt NCCH and CIA files—the standard formats for 3DS games and applications.

Several popular homebrew applications rely on or interact with this file: enctitlekeysbin 3ds top

Dumping keys from your own cartridges is generally considered a "gray area" for personal backups, but downloading a pre-made .bin file containing keys for games you don't own is illegal. It is required to decrypt NCCH and CIA