GENESIS
The first physical bitcoin key, self-generated, offline, secure.
A key designed to endure time and elements, celebrating Satoshi Nakamoto's bitcoin innovation and transactional freedom.
The modulo GENESIS is a functional private key you create independently, safely under your own control, without a need for technology.
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For bitcoin, for nostr, for anything that requires 256-bit entropy.
Security and Safety
Privacy and preservation are the core of GENESIS.
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Create your bitcoin key without electronics or microchips for unparalleled security, capturing real-world entropy to protect your wealth. No operating system means your private key information is safe from hackers and malware from inception.
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The key is made from SUS304 stainless steel for long-lasting durability and strength, chosen for corrosion resistance properties that will endure for generations.
Offline from the Beginning
The GENESIS key begins by randomly assembling 256 bits into the eight slots. Together they form a binary value that converts entropy into a number that cannot be duplicated.
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Over 115 quinvigintillion possible numbers between 0 and 115792089237316195423570985008687907852837564279074904382605163141518161494336.
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Security made simple.
Use and Safekeep Your Key
Create public keys and receive addresses via any offline and secure tool, including this website's free example spreadsheets, taking care to not expose your key to internet-connected devices.
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The GENESIS is a bitcoin key with a safety vault. ​A 4mm thick SUS304 stainless steel case protects your key, keeping it safe for long-term storage.​​​​
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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.
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We design and develop privacy devices, a collaboration resulting in the first physical bitcoin private key.
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Our purpose is to create beautiful, simple tools that give customers control, safety, and security in form and function.
Privacy in simplicity.
Visit Our Store
​​Visit our store for currently available products.
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​​For other questions or custom orders you can reach us at the Contact page.