Cryptosign Custom Citadel Plates: Zero-Knowledge SSS Deployment

Indestructible offline security for your most valuable digital assets.

Cryptosign Custom Citadel Plates turn your 12/24-word seed phrases, private keys, SSL certificates, API keys, and passwords into physical, ultra-secure Shamir’s Secret Sharing shares. Manufactured using our proprietary Blind Printing technology, we never see your plaintext data.

Why Cryptosign Custom Citadel Plates are different:

• Zero-Knowledge Manufacturing: Our Blind Printing protocol ensures you encrypt locally. You submit only the encrypted string; we print only the encrypted string.
• Shamir’s Secret Sharing (SSS): Split your payload into 3-of-5, 5-of-7, or any custom threshold you choose via our air-gapped terminal.
• Extreme Physical Resilience: Fireproof, water-resistant, tamper-evident, and built to survive catastrophe.
• Premium Armor Materials: Choose from aerospace-grade Titanium, cold-rolled Stainless Steel, or carbon-infill tactical polymer.
• Perfect for Real-World Use: Formatted exactly for our plates, whether you use QR codes, hex, binary dots, or encrypted alphanumeric text.

WHAT IS IN THE KIT :

• 5x Custom Engraved Citadel Plates: Manufactured in your choice of material (Titanium, Stainless Steel, or Polymer).
• 1x Tactical Storage Box: Color-coded (Black, Red, Blue, or Yellow) for easy vault identification.
• 5x Tamper-Evident Security Bags: Level 4 serialized bags to secure each individual plate before distribution.
• 1x Doomsday Recovery Manifest: The physical, printed step-by-step guide for you to manually reconstruct the secret without digital tools.

BUILDING A LARGER VAULT? > Need a 7-of-10 or 5-of-9 setup? [Click here to add individual Expansion Plates to your deployment].

THE SECURE HANDOVER PROTOCOL: To maintain strict air-gapped security, we do not accept encrypted payloads through standard web forms.

1. Procure your plates: Complete your checkout for the blank custom plates below.
2. The Secure Link: Upon order confirmation, you will receive a secure Signal messenger contact protocol.
3. The Drop: Transmit your order number and your offline-generated encrypted metadata via Signal (E2EE with vanishing messages enabled).
4. Blind Manufacturing: We engrave your plates and purge the transmission logs.