Trezor passphrase and seed restoration

DaveF

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Quote from: bitmover on September 09, 2019, 10:01:55 AM

Edit: this vulnerability is not something to worry so much about imo. What are the chances that some hacker steals your trezor? I think that's a very low probability

Since we don't know him that is a fairly broad statement.
Could be a deliberate targeted theft, relative, whatever.

Could also be a year down the road and he brought it with him to a blockchain conference someplace and there are pickpockets targeting people.
It's money, be paranoid.

-Dave

o_e_l_e_o

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Quote from: DireWolfM14 on September 09, 2019, 09:45:15 AM

If I do lose my Trezor and need to restore my wallet do I need another Trezor to be able to able access the newly created wallet? Is there anyway to restore a passphrase encrypted Trezor wallet by using Electrum (for example?) Does the passphrase essentially become an extension of the seed phrase?

In order: No, yes, and yes.

You do not need another Trezor. Many different wallets support passphrases, including Ledger devices and Electrum.

Yes. Open Electrum, enter a new wallet name, select "Standard wallet", then "I already have a seed". Enter your 24 word seed. Select "Options" and check the box "Extend this seed with custom words". If your seed was created by Trezor, then it will be BIP39, so tick this option as well. Hit "Next". On the next screen, enter your passphrase. Hit "Next" again to create your wallet (and add a password if desired).

I wouldn't call it an "extension" per se, but you obviously need both to access your coins, and some places do refer to the passphrase as the "25th word". What actually happens is that your seed and passphrase are combined in a function called PBKDF2, which is used to derive your keys.

bitmover

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You can recover it in any good wallet that works with bip39.

You can play around with privatekeys and see for yourself using https://www.iancoleman.io/bip39

Just insert a random seed there and add a passphrase (never insert your seed generated from your trezor there).
When you scroll down this website you will see all privatekeys and their qrcodes.

So no, you don't need a trezor to recover it, as you have your privatekeys. You just need the seed and the passphrase

Alternatively, you can buy a ledger and recover it there. Or Electrum wallet.

Edit: this vulnerability is not something to worry so much about imo. What are the chances that some hacker steals your trezor? I think that's a very low probability

DireWolfM14

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The recent revelation of a security issue with Trezor (and keepkey along with other open-source firmware wallets) has got me thinking. Satoshi Labs have addressed the vulnerability, and claim it's a remote threat. None the less, I'm now quite concerned about losing my Trezor, or having it stolen. I love my Trezor T, and since I use it to store the coins for my lending service I like bringing it along when I'm away from home, which I am now reluctant to do.

The solution; add a strong passphrase, which creates another wallet. That, however brings up another question: If I do lose my Trezor and need to restore my wallet do I need another Trezor to be able to able access the newly created wallet? Is there anyway to restore a passphrase encrypted Trezor wallet by using Electrum (for example?) Does the passphrase essentially become an extension of the seed phrase?

I wanted to take some time to research this over the weekend, but didn't have time. So, I'm asking the experts.

Thanks in advance.

Topic: Trezor passphrase and seed restoration (Read 178 times)