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Encryption & Backup Options

Every W2QR wallet uses password-based honey encryption. After creating your encrypted QR, you can strengthen protection with a Strong Password, biometric gate, Google Drive backup, or Shamir split.

Password-Based Encryption

W2QR encrypts your seed phrase with your password using honey encryption. The resulting QR code is your backup. To restore, scan the QR and enter your password. There is no mode selection — every wallet uses the same encryption flow.

How it works: Your password goes through Argon2id (64 MB memory, 3 iterations), producing a key that is XOR-mixed with your mnemonic entropy. Every password produces a valid mnemonic — there is no way to tell which one is correct without checking the blockchain.

+ Simple — one password, one QR code
+ Works completely offline
+ No account or device registration needed
+ Compatible with all BIP-39 wallets
+ Every password decrypts to a valid mnemonic (plausible deniability)

Additional Protection

After creating your encrypted QR, you can add layers of protection. These are layered on top of password encryption — they do not replace it.

Strong PasswordUse the Strong Password Generator to derive a quantum-resistant password from a memorable catchy phrase. Store it as a password QR for easy scanning. If you lose the password QR, regenerate it from the same phrase.
Google DriveBack up your encrypted wallet QR to Google Drive. If you lose the physical QR, restore the encrypted data from the cloud. Google never receives your password or seed phrase.
Biometric / PINAdd Face ID, fingerprint, or PIN as a verification gate before wallet access. Protects against unauthorized use if someone obtains your QR and password.
Plastic CardsPrint your wallet QR and password QR on credit-card-sized plastic cards. Two physical cards that together give you durable, portable access to your wallet.
+ Strong Password + plastic cards provide layered, quantum-resistant protection
+ Lost your QR? Restore encrypted data from Google Drive
+ Forgot your password? Regenerate it from your catchy phrase
+ Honey encryption still active — wrong password produces valid decoys

Shamir Split — Distributed Custody

Shamir split is available as a backup tool for existing wallets. It splits your mnemonic entropy into N shares using Shamir Secret Sharing, then honey-encrypts each share independently with its own password. Each share becomes a standalone QR code or encrypted text string.

Password options: Choose one password for all shares (simpler) or individual passwords per share (stronger — ideal when different people hold different shares).

+ No single share reveals any information about the mnemonic
+ Works completely offline — no account, no server, no device enrollment
+ Each share is independently honey-encrypted (Argon2id + XOR)
+ Ideal for multi-party custody (family, team, inheritance)
- No password recovery — if you forget passwords, shares are unusable
- No cloud backup — you manage share storage yourself
- Must gather M shares physically to restore

W2QR Cards — Pre-Printed Wallet Cards

W2QR Cards are pre-printed physical or digital cards with QR codes. The QR contains random data that becomes a wallet when activated with your chosen password through honey encryption.

Activation: Scan the card, enter a password, and receive your unique wallet mnemonic. Use the Strong Password Generator for quantum-resistant protection, and print both wallet QR and password QR on plastic cards.

+ Create a physical wallet card before the wallet itself exists
+ Plausible deniability — any password produces a valid wallet
+ Add backup features after activation
+ Five card design templates (Midnight, Ocean, Emerald, Graphite, Light)

Plastic Card Activation

A pre-printed W2QR plastic card ships with password-only honey encryption. It works immediately as a backup — scan the QR, enter your password, and access your wallet.

Recommended setup: use the Strong Password Generator to create a quantum-resistant password from a catchy phrase, then print the generated password as a second QR on its own plastic card. Back up your wallet QR to Google Drive for extra safety.

+ Start using immediately with just a password
+ Two plastic cards (wallet QR + password QR) for durable, portable access
+ Lost the password QR? Regenerate it from your catchy phrase
+ Optional biometric/PIN gate for additional protection

Format Compatibility

W2QR reads QR codes from all previous format versions, including V1 (text2qr.com), V2B, V2A (legacy), and Shamir shares. Existing encrypted QR codes continue to work regardless of which version created them. New wallets use the current format with password-based encryption.

Can I add features later?

Yes. You can add protection features to any wallet at any time. Open your encrypted QR, and W2QR will offer to add Google Drive backup, biometric protection, and Strong Password. Your original encrypted QR continues to work with just your password. You can also create Shamir shares from an existing mnemonic at any time.

Recovery

Google Drive stores your encrypted wallet QR backup — restore it if you lose the physical QR. If you forget your password, regenerate it from the same catchy phrase using the Strong Password Generator. Without these features, your password is the only key — use a Strong Password from a catchy phrase to ensure you can always regenerate it.

Learn more about recovery →