Hardware Wallet

A hardware wallet is a purpose-built device, usually the size of a USB stick or a small card, that generates and stores private keys in a secure chip. When you want to send crypto, the computer or phone prepares the transaction, the device displays the details on its own screen, you confirm with a button press, and the device returns a signature. The private key never leaves the device.

Ledger and Trezor are the best-known manufacturers, and there are many others. Prices range from roughly 50 to 300 dollars. The device is paired with wallet software on a computer or phone that shows balances and builds transactions. Most support hundreds of coins and tokens, and many can connect to DeFi apps through MetaMask or similar interfaces.

The hardware wallet is only as safe as its seed phrase backup and the user's habits. Buy directly from the manufacturer to avoid tampered devices, verify the recipient address on the device screen rather than the computer screen, and never enter the seed phrase anywhere except the device itself during recovery.