Trezor Wallet Backup Description: BIP39 (12 or 24 words) vs. SLIP39 (20 words) | By Lucien Bourdon | April 2025

What is the Trejo Dunge that supports the SLIP39 backup?

SLIP39 backups are supported by Trezor Model T, Trezor Safe 3 and Trezor Safe 5.

Can I upgrade my existing BIP39 wallet directly to Slip39?

Slip39 is another backup standard. To switch, you need to create a new SLIP39 wallet and transfer funds.

Can I upgrade the SLIP39 backup later?

yes. If you start with a 20 -word single -shared backup, you can upgrade to multi -sharing at any time using Trezor Suite. The original backup still works unless you choose to retire.

Can I use password with BIP39 and SLIP39?

Yes, but introduce a new single failure point. If you lose or forget your passphrase, you will not be able to recover your wallet with the right backup. Do not lose it and lose it.

What happens if Trezor stops making hardware wallets?

BIP39 and SLIP39 are open standards supported by several wallets. Even if you can’t use Trezor, you can recover your wallet using other compatible devices or software.

Is SLIP39 compatible with multisig?

yes. SLIP39 can be used to safely back up one of the heights of the multi -cage wallet. If the original device is lost or cannot be used, the SLIP39 can be used to restore the key and import it to a new device.

How many weeks can you make with SLIP39?

Up to 16 weeks. More stocks can provide more flexibility, but it is more difficult to track.

What if you lose your shares?

As long as you still have the number of shares you still need maximum), I can recover my wallet. If it is less than the threshold, it is impossible to recover and cannot extract the available information on wallets or keys. If you think more than one stock is damaged, it is safest to create a new wallet and move your funds.

Why do you use multi -sharing instead of dividing regular backups?

SLIP39 uses encryption to divide the backup safely. Neither of the stocks that are less than the critical prices are revealed by itself. By manually dividing the BIP39 phrases (e.g., half in one place, half elsewhere) does not provide the same protection, increasing the risk of accidental loss or compromise.

What is the difference between 12 words and 24 words BIP39 backups? Is 24 words safer?

There are more entropy in 24 word backups, but 12 word backups are not already wrong. Even if you have billions of supercomputers, it will take a long time to wait indiscriminately.

The most important thing is not the number of words. Backup is safe and keeps individual and offline.

Why does SLIP39 use 20 words?

SLIP39 uses 20 words because each sharing includes additional information such as groups and threshold data and more powerful check islands for detecting errors. The longer format helps each stock to see if it is unique, verifiable and safe.

Should I upgrade to SLIP39?

If the BIP39 backup is safe and work well, it does not require urgent transition. But if you’re looking for an improved security, flexibility or a single failure point, Slip39 can be a better option.