NGRAVE ZERO

The NGRAVE ZERO is a premium air-gapped hardware wallet built in Belgium for serious crypto investors. Its headline differentiator is the CC EAL7 certification — the highest security certification any financial or blockchain product has achieved, awarded to NGRAVE's custom operating system rather than an off-the-shelf mobile OS like most competitors.

Air-gapped by design. The ZERO is genuinely connectionless: no USB data, no Bluetooth, no NFC, no WiFi, no 4G. The only physical port is USB-C, used solely for wall charging and signed firmware updates. Every transaction is initiated on the companion NGRAVE LIQUID app, then scanned as a QR code and signed offline on the ZERO, eliminating entire classes of remote attack.

Premium hardware. A 4-inch high-clarity LCD touchscreen (480×800 px, 600 cd/m²), a fingerprint biometric sensor, an 8-digit PIN, and a body machined from a custom zinc/aluminum/magnesium/copper alloy — IP55 water-and-dust resistant at 125×70×13 mm and 214 g. It runs four languages (English, Spanish, French, Dutch) and supports 3,500+ coins and tokens across 15 native chains plus all Ethereum and MultiversX tokens.

Key generation you can trust. NGRAVE's signature Perfect Key is a 64-character hexadecimal equivalent of a BIP39 24-word seed phrase. The ZERO uses your fingerprint as a variable in key generation and lets you shuffle parts of the key on-device — so even NGRAVE never sees or holds it. Backup lives on the optional NGRAVE GRAPHENE, the first encrypted, recoverable stainless-steel backup.

DeFi without compromising security. Through QR-based integrations with MetaMask and Rabby Wallet (browser and mobile), the ZERO lets you stake, swap and bridge Web3 assets while keeping your private keys offline behind multi-layer tamper protection that auto-wipes if the device is opened after setup.

4” Touchscreen — “Just Like a Phone”

• 4-inch high-quality capacitive LCD at 480×800 px and 600 cd/m² clarity — no tiny buttons or cramped screens.
• Tap-and-swipe UX engineered so crypto management feels seamless, like a smartphone, not a USB dongle.
• Full-transaction transparency: review every address, amount, contract and fee before you sign.

Fully Offline QR Transaction Flow

• Initiate a transaction on the NGRAVE LIQUID companion app to generate a Transaction QR.
• Scan the QR with the ZERO's built-in 640×480 camera (with light sensor) and sign offline.
• Your private keys never leave the device and the device never connects to a network, cable or radio.

The NGRAVE Perfect Key

• A 64-character hexadecimal master key — equivalent to a standard 24-word seed phrase — that you can convert back to BIP39 words or import into another wallet if you ever leave NGRAVE.
• Uses your fingerprint as a variable in key generation and lets you shuffle the key parts on-device so NGRAVE never holds or sees it.
• For BIP39 purists: the Perfect Key is convertible to and from a 24-word mnemonic.

NGRAVE GRAPHENE — Stainless-Steel Backup

• The first encrypted, recoverable stainless-steel seed backup — fireproof, waterproof and shockproof.
• Sold separately; pads pair with a unique secret so neither pad alone reveals your key (and they're verifiable without exposing the key).

100+ Accounts on One Device

• Create more than 100 separate accounts on a single ZERO so all your wallets live on one device.
• Passphrase unlocks hidden wallets with fresh coin/address sets that are never stored on the device.

MetaMask & Rabby Wallet DeFi Integrations

• Sign DeFi, staking, swap and bridge transactions in MetaMask and Rabby Wallet (browser & mobile) while keys stay offline.
• QR-based workflow means no browser extension or hot wallet ever touches your private keys.

CC EAL7 Certification (Industry First)

• The ZERO is the only crypto hardware wallet whose operating system earned CC EAL7 certification — the highest Common Criteria evaluation awarded to any blockchain or financial product.
• NGRAVE's OS was built from scratch by security experts; it isn't a hardened mobile OS, removing mobile-OS vulnerabilities entirely.

True Air-Gap (No Connectivity)

• No USB data, no Bluetooth, no NFC, no WiFi, no 4G — the ZERO is genuinely connectionless.
• USB-C port is used for wall charging and signed firmware updates only, never for transacting or signing.
• All communication happens via transparent QR codes scanned by the built-in camera.

Multi-Layer Tamper Protection

• Tamper-evident shipping: you cannot open the ZERO without leaving visible traces, so you can verify the device wasn't manipulated in transit.
• Auto-wipe on theft: after setup, internal sensors wipe the device if it is forcibly opened, destroying the key.
• Combined with the firmware-update signing, this defends against supply-chain intercepts and invasive hardware attacks.

Biometric + PIN Authentication

• A 12×12 mm fingerprint sensor is used as a variable in key generation, for unlocking the device, and for co-signing with the 8-digit PIN.
• Your fingerprint template is never stored remotely and helps ensure the Perfect Key is genuinely unique to you.

Passphrase & Hidden Wallets

• Extend your Perfect Key with a passphrase to unlock a separate hidden wallet with fresh coins and addresses.
• Passphrase-protected wallets are not stored on the ZERO — create as many as you want for plausible-deniability setups.

NGRAVE is a Belgian hardware-wallet company headquartered in Brussels, Belgium, founded in 2018 with a single mission: build the world's most secure crypto cold storage. NGRAVE is the only hardware-wallet maker to ship a device whose operating system earned CC EAL7 certification — the highest security standard in the blockchain and financial industry.

Every NGRAVE ZERO is designed, engineered and manufactured in Belgium with a small-volume, quality-first approach. NGRAVE's ecosystem ties three products together — the ZERO hardware wallet, the LIQUID companion app for initiating offline transactions, and the GRAPHENE stainless-steel encrypted backup — to give investors a frictionless but auditor-grade self-custody experience. The ZERO has been independently endorsed by leading security voices including Jean-Jacques Quisquater (second reference on the Bitcoin whitepaper), CoinBureau and Cyber Scrilla.