Blocky saysHardware wallets keep private keys on a dedicated offline device that signs transactions.
A hardware wallet (Ledger, Trezor, Keystone) stores keys in a secure element and signs transactions on-device — the private key never touches your internet-connected computer. You confirm details on the device's own screen, defeating malware that would alter a transaction on your PC. It's the gold standard for self-custody of meaningful amounts, combining cold-storage security with usability.
Power-ups you unlock
Keys live on a dedicated offline device
Signs on-device; key never leaves it
Confirm details on the device screen
Cold-storage security, usable
Double-Spend Dan attacks — common mistakes
Buying second-hand/tampered devices
Approving transactions without reading the screen
Storing the seed insecurely despite the device
Boss battleExplain how a hardware wallet protects you from a compromised PC.
Example code
<!doctype html><html><head><meta charset="utf-8"></head>
<body style="background:#06040d;color:#e6e0ff;font-family:monospace;padding:20px"><pre>PC (maybe infected) → builds tx → device
device: shows real details, you confirm, signs internally
key never touches the PC</pre></body></html>