The coldest backup


A backup solution made from Stainless Steel 316, to keep your secret keys safe

Everlasting backup solution

Water- & Corrosion 


Two Parts

Recoverable in Case of Loss

Fire Resistant

Size = A5*

* 148 x 210 mm (5.83 x 8.27 inches)

Everlasting Backup

No more paper wallets

Made of high quality stainless steel that can withstand extreme temperatures of up to 1660 degrees Celsius, your NGRAVE GRAPHENE will still be there when your house burns down.

The product is also resistant against water- & corrosion damage, and is shock- & buried-proof. No more need for traditional industry practice of writing down your private key on a piece of paper. 

The NGRAVE "Perfect Key" is the 64 character hexadecimal (0-9; A-F) equivalent of a 24 words mnemonic phrase / 256 bit master seed. The rationale behind this format is that it not only allows for adding a double security layer by completely splitting the key into two parts, but also for an ingenious recovery mechanism of the key. This format can at any time easily be converted into its mnemonic phrase or 256 bit equivalent.

Lower plate to be punched in

Unique upper plate to punch holes through 

(& click-embossing pen to punch them)

Split The Backup

Attackers Need to Find 

Both Parts

NGRAVE created a cryptographic puzzle of two agnostic plates: if someone finds one of the plates, he/she has zero information on your actual key. Both plates are required to recover the key.

Your backup is precious

If you lose your hardware wallet, you need a good key backup to recover your accounts.

The GRAPHENE allows you to finally safe keep each part in a different location as an additional measure of security.

Keep your keys offline

Recoverable upper plate

A Backup of Your Backup

Recover your backup without 3rd party risk

NGRAVE introduces an ingenious answer to the question "What if I lose my backup?" by making the upper plate recoverable. 

Each upper plate configuration is unique and personal, and can be recovered by NGRAVE in case of loss. As NGRAVE (or any other 3rd party) has no access to your lower plate, they cannot steal your secret key. 



Create Your Backup

in 3 Easy Steps

Generate your unique key with the ZERO. 

From this single key, all your crypto accounts are created, and you only need this single key to recover all of them in case you lose your ZERO.

Generate your perfect key

Bring your upper and lower plate together and use the NGRAVE pen to make a hole in each of the 64 columns. Every column represents one character of the secret key.

Punch your key



It is highly recommended to store and safeguard each plate separately if you want to benefit from the GRAPHENE's double security layer. 

Split both plates.

Hide them separately

What Our Early Adopters Say

Co-founder, HIVE Blockchain Society

"The GRAPHENE makes me feel safe. Plus, I can actually reuse the upper plate to punch out different keys in different lower plates. No more worrying about my paper wallets!"

Guillaume Veldekens

"I’ve met the team & directly felt their mission to challenge existing cold storage solutions. They managed to build a product that meets these challenging specifications & that also excels in user experience."

Levi Haegebaert

Author Bitcoin, Blockchain & Beyond

"I'm amazed by how these guys are always one step ahead. For every 'what if" they have an answer ready, e.g. "What if I lose my ZERO", "What if I lose my backup?', and so on."

Jean-Luc Verhelst