GENESIS
The core of bitcoin protocol.
Your private key generated safely offline under your own control, independent of technology.
Multi-generational bitcoin storage without intermediaries or third parties, celebrating Satoshi Nakamoto's bitcoin innovation and transactional freedom.
For bitcoin, for nostr, for networks, for anything that requires 256-bit entropy.
Strength
Longevity is built in.
The GENESIS key is made from SUS304 stainless steel for long-lasting durability and strength, chosen for corrosion resistance properties that will endure for generations.
The GENESIS also comes with a safety vault—a 4mm thick stainless steel case to protect your key, keeping it safe through disasters.
No microchips, no paper or inks, no degrading data. This key functions regardless of time's passage.
Security
Create your bitcoin key without electronics or microchips for unparalleled security. No operating system means your private key information is safe from hackers and malware.
Randomly assembling bits into the eight slots converts real-world entropy into a number that cannot be duplicated.
All 115 quinvigintillion+ possible bitcoin keys between 0 and 115792089237316195423570985008687907852837564279074904382605163141518161494336.
Exceptional privacy through designed-in security.
Simplicity
Create your seed phrase for HD wallets, public keys and receive addresses via any offline and secure tool, including this website's free example spreadsheets, without exposing your key to internet-connected devices.
With your GENESIS key you can add passphrases for added security, create a master private key, or any combination of additional security steps.
As with any private key, a backup is always strongly encouraged.
Should you want to display your key, the cover's base functions as a stand, perfect for office, desk or library.
About Us
LEJR and modulo stand for privacy and independence.
We design and develop privacy devices, a collaboration resulting in the first physical bitcoin private key.
Our purpose is to create beautiful, simple tools that give customers control, safety, and security in form and function.
Visit Our Store
Visit our store for currently available products.
For other questions or custom orders you can reach us at the Contact page.