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The hardware wallets, e.g., Trezor and Ledger, support bip39 with an optional passphrase. In theory, since bip39 is a standard, you should be able to recover these hardware wallets to any ethereum wallet, but I am having difficulty finding software wallets that support the optional passphrase.

  1. Which wallet generators allow you to specify an optional passphrase when generating the mnemonic seed?

  2. Which wallet programs allow you to import bip39 mnemonic seeds with a passphrase?

  3. If I already have an address I'm happy with, is there a tool that can show me what the corresponding mnemonic seed would be that, when combined with a given passphrase, would yield my current address?

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As far as I know:

The main providers of BIP39 supported wallets are:

If you're going to use the mnemonic seed functionallity, I'll highly recommend you to use BIP44 wallets, not BIP32 because They are more secure.

Here the explanation: https://www.reddit.com/r/Bitcoin/comments/2srxr2/what_is_the_difference_between_bip_32_and_bip_44/

Here the BIP39 github: https://github.com/iancoleman/bip39 And here you can generate whatever mnemonic you want: https://iancoleman.io/bip39/

Hope it helps.

0

Here : https://www.myetherwallet.com/#view-wallet-info

You can recover a full wallet with mnemonic phrase, by connecting Ledger Nano or Trezor...

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  • Be careful with Seldar's answer. It looks like his link is a phishing scam. Etherwallet's official site is a .com, not thar garbage github fake. Jul 9 '17 at 2:52
  • @tayvano Can you please help clarify? (Looks like it is a good suggestion to remove the github.io version too, even if legitimate, to reduce confusion.)
    – eth
    Jul 9 '17 at 3:01

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