Air-Gapped Wallet Security with ATECC608A

Secure-element-backed key management and ECDSA signing on constrained devices, with offline transaction signing across a QR-code air gap for multi-chain hardware wallets.

Keys must stay secret even if the host is fully compromised, while signing happens on a small, low-power device. How do you make hardware-rooted cryptography both secure and practical on constrained embedded platforms?

• Key generation and storage inside an ATECC608A secure element
• On-device ECDSA signing; keys never leave the element
• A fully air-gapped QR workflow for offline transaction signing
• Multi-wallet / multi-chain account handling

Add to confirm: measured signing latency, supported curves/chains, and threat model. Direction: formal evaluation of the air-gap channel and side-channel resistance.