Generate a Fingerprint
You enter an existing BIP39 mnemonic. That is to say, you enter the 12 words of your wallet to generate the access key to the software. (Nothing is sent to any server)
Idle
Length: 0 / 218
Security notice: All information generated on this page is processed locally and is never transmitted to our servers.
Do not share any generated keys, phrases, IDs, or activation data with anyone.
Word count: 0 / 12
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Lang: —
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Tip: paste with Ctrl + V
Entropy: —
Security: —
BIP39 salt = "mnemonic" + passphrase.
Changing this produces a completely different key.
Advanced settings
Required prefix for BitFlashX.
Keep stable to match your software.
Output charset: Base62 (A-Z, a-z, 0-9). No special chars.
Ready.
Validation: —
Crypto Pipeline
Live steps
Export
QR code from output
Tip: QR updates from your generated key. Use Print QR for a clean paper export.
Quick Verify
Checks prefix, length, and alphanumeric policy (same as your app).
Derivation Stack:
Domain-separated KDF ladder
→ salted key-stretch + entropy whitening
→ context-bound extract/expand (HKDF-class)
→ canonical serialization + constant-time normalization
→ Base-N encoding
→ fixed-length tail-truncation(200) with
collision-resistance guard.