
User-Created Passphrase
The encrypted private key can only be decrypted by the user-created passphrase. This is a trustless, two-factor security design based on the Bitcoin BIP38 open-source standard. The process utilizes advanced cryptography but the complexity is hidden from the user. You only need to follow a few basic steps. First, create a passphrase and use an open-source software tool to generate a BIP38 intermediate code. Then send the intermediate code to us and we manufacture a cold storage with an encrypted private key that can only be decrypted by the passphrase you used to generate the intermediate code. A BIP38 confirmation code is engraved on each cold storage so you can cryptographically verify that the encrypted private key can actually be decrypted by your passphrase.

Triple Backup
The PRO Series comes in a package of three identical cold storages, with only a different suffix (a, b, c) in the serial number. All three cold storages contain the exact same primary account deposit address, private key entropy, and BIP38 confirmation code. This allows you to store backups in multiple locations. Redundancy can preserve access to your funds in case of fire, theft, or other catastrophic event (if you remember your password). This is one of the most simple, elegant, and resilient backup solutions imaginable.

Multicurrency Support
The PRO Series cold storages can hold multiple cryptocurrencies and tokens at the same time. More than 100 of the most popular coins are supported, plus all ERC20 and BEP20 tokens. To activate additional cryptocurrencies or tokens on your cold storage, open the Ballet Crypto App, scan the deposit address QR code on your cold storage, tap “Manage,” then tap “Activate” for the one you want to add.