HARDWARE WALLETS / OFFLINE ENCRYPTION
Your keys.
Your rules.
Sign Bitcoin. Encrypt your seeds.
Protect what belongs to you alone.
Hardware built to operate offline.
An ecosystem for making your own decisions.
CUVEX / BIT
ANODISED ALUMINIUM
BIOMETRIC IDENTITY369 USD
BIOMETRIC IDENTITY369 USD
Reference price in USD.
≈ 0.00520959 BTC≈ 369.092274 USDC
USDC is not currently available as a payment method.
SELF-CUSTODY IS MORE THAN A WALLET
Protect your funds.
And your ability to
recover them.
Your Bitcoin needs a signature. Your future needs a backup. Cuvex brings both together in a system you control.
01
Authorise with your own hands.
Review and sign Bitcoin transactions on a dedicated device, with cryptographic operations kept off the Internet.
02
Keep secrets. Do not expose them.
Encrypt wallet seeds and other secrets. The device does not persistently retain private keys; your backups stay encrypted on external media.
03
Design your recovery plan.
Decide where to keep your backups and who must take part in decrypting them. Test your plan before you need it.
A SEPARATION THAT MATTERS
The connected world.
Your signature, separate.
The app communicates with the network. Cuvex performs cryptographic operations offline. You check what you are about to authorise on the device's screen.
Understand the architecturePREPARING ≠ SIGNINGVERIFY → AUTHORISE
SIGNING MEANS DECIDING
Your WOW App prepares.
Your Cuvex authorises.
A Bitcoin transaction has three distinct stages. Signing takes place on the device, after you review what you are about to send.
WATCH-ONLY APP ONLINE
Prepare transfer
DestinationReceiving address
AmountYour choice
FeeReview before signing
Unsigned PSBT
Explanatory diagram · Not a real transaction
CUVEX OFFLINE OPERATION
Authorisation happens here
BIT: files via USB-C · Original: NFC cards
BITCOIN NETWORK ONLINE
Signed PSBT
The app broadcasts the transaction. The network confirms it.
TWO DEVICES. ONE PHILOSOPHY.
Find your Cuvex.
Choose how you want to protect, recover and sign.
THE CUVEX ECOSYSTEM
Everything connected.
The signature, separate.
The app works alongside your device: organising, preparing and communicating. Sensitive operations have their own place.
01
Watch-Only and Coin ControlCheck balances, label and freeze UTXOs, and choose which coins to use.
02
End-to-end encrypted chatChat, share cryptograms and coordinate payment requests. Accepting a request does not sign a transaction.
03
Backups and recoveryManage encrypted media according to your model and cryptogram type.
CUVEX
YOUR CONTROL SPACE
Observe.
Organise.
Prepare.
Organise.
Prepare.
A private conversation.End-to-end encryption
Coin Control
WATCH-ONLY Private keys kept out of the app
LEARN BY WATCHING
Security can also
be learned.
From first power-on to your first signature.
Official video tutorials, organised for your device.
STRAIGHT TO THE POINT
What you want to know.
Is Cuvex a hardware wallet or a seed protector?
Both. Original and BIT sign Bitcoin transactions using PSBTs and encrypt seed phrases or other secrets. Protecting a seed for a wallet on another network does not mean the device signs transactions on that network.
How does BIT differ from Original?
BIT adds an aluminium body and optional biometrics, removes NFC and Bluetooth from the device, and exchanges files via USB-C. Original uses NFC cards and reserves Bluetooth for firmware updates. Both perform cryptographic operations offline.
Can I use the seed I already have?
You can encrypt an existing recovery phrase or create a new one following the device's procedure. Do not enter that phrase on this website: encryption takes place on Cuvex.
What happens if I lose the device?
The secret is not persistently stored on the device. Recovery depends on having the encrypted backups and the necessary credentials. Biometric cryptograms require Cuvex BIT; compatible non-biometric cryptograms have other recovery options, including Cuvex's desktop tool.
Do I need an account to use the app?
The Watch-Only app does not require a user account and contains no private signing keys. Purchasing and shipping the device are separate processes that may require contact and delivery details.
YOUR DIGITAL SOVEREIGNTYThe next step
The next step
is yours to decide.
Start with the device that suits you.
CUVEX DESKTOP + MIRROR
Your Cuvex, on your computer too.
Cuvex Desktop
Cuvex Desk brings your tools together on Windows, macOS and Linux. In normal use, you review and authorize sensitive operations on your Cuvex. Mirror supplies your phone’s NFC; local decryption is reserved for emergencies.
Windows · macOS · Linux
Explore the apps →Cuvex Mirror
Cuvex Mirror uses your compatible smartphone’s NFC to read and write cards for Cuvex Desktop through an encrypted Bluetooth connection. It is required to fully operate Cuvex Original with Desktop. Mirror does not decrypt your secrets or replace authorization on the hardware.
What do I need to use Cuvex Mirror?
You need Android 8 or later with NFC, a camera and Bluetooth peripheral mode, plus a computer with compatible Bluetooth and Cuvex Desk. A temporary PIN and QR bind the session. Mirror needs no account or Internet permission and does not decrypt your secrets.
ORIGINAL 1.2.1 · BIT 1.2.2
What they share. What you should know.
What does AES-256-GCM add?
New cryptograms use AES-256-GCM authenticated encryption, checking the protected content and authentication tag. This does not mean that all metadata or every older copy has this protection.
Is cryptogram multisignature the same as Bitcoin multisig?
No. Protect decryption with up to six participants, requiring everyone or a threshold such as 2 of 3. This policy controls access to the secret; it does not turn a wallet into a Bitcoin multisig wallet.
Which transactions can these versions sign?
Both devices process BIP174 v0 PSBTs with P2WPKH inputs and SIGHASH_ALL. They review recipients, amounts, change and fees; approval is bound to that transaction and the signature is verified. Displaying Taproot Bech32m recipients does not mean signing Taproot inputs. Private keys are not exported for signing.