Dear Trezor Support Team,
I hope this message finds you well.
I recently destroyed and disposed of the recovery seed (seed phrase) that was previously generated on my Trezor Safe 3. After doing so, I chose the “Create New Wallet” option to set up a new wallet on the same device.
I would like to confirm the following:
Is the newly generated seed phrase completely unrelated to the one I previously destroyed?
Can I be certain that this new wallet is entirely independent and secure, with no connection to the old wallet?
As long as I did not restore the old seed, is there any chance that the device reused the same seed phrase?
I just want to be 100% sure that my new wallet and its recovery seed are unique, secure, and not derived from the previous one.
Yes. No user data remains on the Trezor after performing a factory reset, so there is nothing that could be used to base the new wallet on the old one.
Far as the Trezor is concerned, the previous wallet never existed.
In addition, the wallet master secret mixes in randomness provided by your PC, so even if some data remained on the Trezor side, any link is destroyed by mixing in the PC-provided random bits.
Yes.*
(*) I mean, you’d have to pay someone trustworthy to do a code review for you. Otherwise you can only be certain as far as you trust a stranger on the internet who’s got a “Developer” badge on the official Trezor forum.**
(**) If you contact Trezor Support, you will be able to confirm this information. But still, your certainty goes only so far as trusting a support agent of the manufacturer.
No.*
(*) Technically speaking, the chance is not literally zero. But the number is so small as to be effectively zero. It will never actually happen during Earth’s lifetime.