Hardware Wallets
Hardware wallets are physical devices that operate as wallets without an Internet connection and keep private keys safely stored within them. This is what is known as Hardware Wallets, due to its cold storage condition, as it does not remain connected to the blockchain or the internet.
They are devices specially designed for this purpose, small HSM units (Security Hardware Modules) with military grade security that allow the generation of private keys and that these never leave the device. Furthermore, if the device tries to be physically manipulated in order to access its private keys, it "commits suicide" by completely removing the keys.
These represent one of the safest and most comfortable options on the market when it comes to cold storage of large amounts of cryptocurrencies. This is due to the fact that they protect the security of the private keys within themselves but allow them to be used comfortably, usually via USB.
Most popular hardware wallets on the market
The Ledger Nano X is a hardware wallet which supports a variety of cryptocurrencies and is the latest edition to Ledger’s popular line of small, pocket-sized HD wallets. The Nano X provides cold storage by creating and storing your wallet’s private keys offline.
SafePal is a highly innovative hardware wallet that seeks to provide crypto users with a “Secure, Simple, and Enjoyable crypto management solution.” The wallet has the backing of prominent crypto industry players like Binance Exchange.
The Trezor Model T is the next-generation cryptocurrency hardware wallet, designed to be your universal vault for all of your digital assets. Store and encrypt your coins, passwords and other digital keys with confidence.
KeepKey is a secure cryptocurrency hardware wallet from exchange ShapeShift, giving full control of your bitcoin and blockchain-based assets with complete transparency in a very safe cold-storage offline environment.