How it works
Seed (24 words) + Passphrase = Unique wallet. Changing even one character completely changes all derived keys.
Advantages
- BIP39 standard — supported by all wallets
- Plausible deniability — can deny having funds
- Infinite wallets from one seed
- Easy to use
Risks
- Forgot passphrase = lost everything forever
- Typo when creating = different wallet
- Too simple passphrase = brute-force attack
Wallet support
- Ledger (Advanced → Passphrase)
- Trezor (built-in feature)
- Coldcard (multiple passphrases)
- Keystone, BitBox and others
Try it yourself
For education only! Never enter real seed phrases.