Wearable Crypto Wallets: How Ring and Watch-Based Cold…
By Damilola Esebame
AI summary of the source article
Wearable crypto cold-storage devices, such as rings and cards, utilize EAL6-plus secure elements and NFC technology to sign blockchain transactions via smartphones without persistent wireless exposure. Tangem generated $61.3 million in 2025 revenue, shipping over six million units amid a broader hardware wallet market projected by IMARC Group to reach $2.65 billion by 2034. Despite convenience advantages, security scrutiny has grown. Ledger Donjon researcher Baptistin Boilot demonstrated a physical laser fault injection attack on Tangem cards, bypassing password reset protections. Because Tangem designs its firmware to be non-upgradable to prevent remote tampering, physical vulnerabilities cannot be resolved through software patches.
Why it matters
The shift toward wearable form factors eases mainstream crypto self-custody adoption, but non-upgradable firmware leaves devices exposed if physical hardware exploits are uncovered.
Key facts
- Tangem generated $61.3 million in 2025 revenue and produced over six million wallets.
- Ledger Donjon researcher Baptistin Boilot demonstrated a laser fault injection attack bypassing Tangem card password resets using $250,000 laboratory equipment.
- The global hardware wallet market was valued at $564.6 million in 2025 and is projected to expand to $2.65 billion by 2034.