A hardware wallet is a physical device that stores the user’s private keys and digital currency. It is the most secure way for users to store their digital assets.
It is a type of cold storage. It uses two-factor authentication and stores the private keys on a piece of hardware, typically in the form of a micro SD card or USB drive.
The wallet can be used to send cryptocurrency transactions, so it is important to keep it safe from being lost or stolen.
A hardware wallet typically holds the user’s private keys in a protected area of a microcontroller, and its firmware is designed to prevent unauthorized communication with that area of the microprocessor. The hardware wallet may have a touchscreen or physical buttons, and often can be used as a mobile device, such as an iPhone app or Android app.
The most popular hardware wallets are Ledger Nano S and Trezor One.