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recovery seed

When configuring an Trezor device, you will be prompted to generate a recovery seed, which is a safe, readable 12- or 24-word string of a BIP39 word list. You will need it to restore your wallet if your Trezor device breaks, is stolen, or you lose access to it. It is by far the most critical part of your security setup, so make sure you back up safely and securely, where you will be out of reach of potentially malicious actors such as hackers or thieves.

It is not recommended to store your recovery kernel online and ideally you should never insert it into any other device, except your Trezor, during the wallet recovery process.

Generating a BIP39 wordlist using a Trezor wallet means generating it completely offline, where no one else can access it. Statistically, it is impossible to use brute force or to guess it in any other way, so it remains safe as long as it has not been copied or exposed to a digital network.

Alternatively, Trezor Model T is the only device on the market that allows you to generate a split recovery seed using a Shamir backup method.

Shamir backup

Unlike other cryptocurrency hardware wallets, Trezor Model T also allows you to backup your device's recovery kernel by splitting it into multiple unique shares. To retrieve the wallet, only a designated number of seed shares must be collected and used - this is called the Shamir backup method, after the cryptographer Adi Shamir, author of the Shamir secret sharing algorithm.

In more practical terms, instead of generate a single 12, 18 or 24 word BIP-39 seed phrase, you can generate up to 16 retrieval shares consisting of 20 to 33 words and set a lower limit on how many retrieval sheets will be needed to retrieve the wallet. The minimum threshold for a full wallet recovery is at least two recovery shares.

Each share can be performed in different locations with different people and constitutes a truly decentralized security setting. Thus, even if you lose a certain amount of shares, you can still recover your cryptocurrency funds without any problems.

The most common Shamir backup settings use 2 of 3 or 3 of 5 shares, but you can tweak them to your individual needs as it's highly customizable.

long password Trezor

Think of a pass phrase as a way to spread your seed of recovery. It consists of up to 50 case-sensitive characters and is chosen by you. Unlike entering a PIN, entering a wrong passphrase will generate a completely new 'empty' wallet, which means it is impossible to access your funds without a correct passphrase. You can also use multiple passwords to set up a 'bait' wallet in the event of a successful physical attack.