Hi guys i want to create a 12 words seed phrase on Trezor Model One instead of the 24 words per default
but there is no option to choose 12 words seed despite trezor claim the model one support both 12 and 24 words
Does anyone know how exactly i can do that
To configure a Trezor One to initialize with 12 or 24 words of your choice, the easiest way is to do the configuration through a third-party wallet compatible with the Trezor One, you can use Electrum, which can be downloaded from its
official website.
When configuring the Trezor through Electrum, you will have options to choose the length of the seed phrase that will be created and displayed on your Trezor, you can choose between 12 - 18 or 24 words.
It is recommended to use 24 words for the Trezor One, due to the fact that you have to type the words of the seed phrase on the keyboard, in a scrambled manner to prevent an attacker from being able to extract the correct order of the seed phrase, however, since the Trezor One scrambles the seed phrase, this risk is mitigated.
When you start a Trezor One with 12 words, the Trezor creates 12 new words just for scrambling purposes when you type your seedphrase on the keyboard for verification or restoration (if you are using the default simple restoration), however these 12 extra words are not part of your seedphrase, they will only appear for the purpose of scrambling, only the initial 12 words should be noted.
Security of 12-Word wallet backups
A 12-word wallet backup provides 128 bits of entropy, which is more than sufficient for the security of your private keys. Bitcoin uses elliptic curve cryptography and 256-bit private keys, but the security of the elliptic curve is around half of the used bits, resulting in 128 bits for the secp256k1 curve used.
In practice, it is highly unlikely that an attacker could guess or brute-force a 12-word wallet backup with 128 bits of entropy in a feasible amount of time. Thus, a 12-word wallet backup offers a high level of security that is sufficient for most users, striking a balance between security and ease of use.
Trezor Model One and the 24-Word wallet backup
The Trezor Model One uses a 24-word wallet backup to enhance security during the basic recovery process on the host computer. When you enter 12 words on your computer in random order, the entropy in random order may not be sufficient to ensure a high level of security. In this case, using a 24-word wallet backup is essential.
However, if you choose not to recover your wallet on the host computer and instead enter all the words directly on the device, a 12-word wallet backup is sufficient for securing your wallet. The Trezor Safe 5, Trezor Safe 3 and Trezor Model offer this functionality.
