The Problem: Migrating Existing Keys and Replacing Lost Hardware Wallets
While generating new keys securely is essential, millions of cryptocurrency holders already have existing blockchain addresses with established transaction histories, staking positions, and smart contract permissions These users need a way to migrate their existing private keys into secure hardware without exposing them during transfer Similarly, enterprises and financial institutions require automated infrastructure to issue pre-configured crypto card wallets at scale and replace lost or damaged cards while preserving the same blockchain identity — capabilities that no existing hardware wallet or cold wallet supports natively
The Innovation: HSM-to-Card Secure Key Injection Pipeline
This patent extends Cryptnox’s Shamir/HSM technology family to cover the reverse process: securely injecting an externally generated private key into a smart card’s CC EAL6+ secure element, and the Hardware Security Module (HSM) infrastructure that enables institutional-grade crypto key management and recovery at scale
The core mechanism works by establishing an encrypted channel between the HSM and the target card’s secure element The private key is encrypted within the HSM using the card’s public key (obtained through the PKI trust chain established by the Card PKI patent family), transmitted through the encrypted channel, and decrypted exclusively within the destination secure element chip The key is then stored non-extractably, with Shamir secret sharing applied for backup At no stage does the private key exist in cleartext outside a certified secure environment
Enterprise Key Recovery and Card Replacement
For enterprise crypto custody operations, this patent enables a capability previously impossible with hardware wallets: on-demand card replacement with full key continuity When a client’s crypto card is lost, stolen, or damaged, the institution can provision a new card with the same cryptographic material from their HSM cold storage — restoring access to identical blockchain addresses and all associated assets without any seed phrase handling or user-side recovery procedures
This infrastructure forms the backbone of Cryptnox’s Card-Wallet-as-a-Service (C-WAAS) platform, enabling banks, fintechs, and crypto exchanges to offer branded hardware wallet cards to their clients with the same operational workflow they use for issuing traditional payment cards
Why This Matters for Institutional Crypto Custody
Institutional adoption of cryptocurrency has been constrained by the gap between the security of cold storage and the operational requirements of serving thousands of clients This patent bridges that gap by enabling secure, scalable, and recoverable private key management through certified hardware Financial institutions can maintain encrypted cold storage of client key material, issue hardware-secured wallets on demand, and replace cards without disrupting client access — all while maintaining the zero-exposure security guarantee that defines Cryptnox’s approach to crypto key management
