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Hardware wallet

In IcelandicVélbúnaðarveski

A small device that keeps private keys offline and signs transactions inside the device, so the keys never reach your computer or phone.

A hardware wallet is a small device, often the size of a USB stick, that stores your private keysPrivate keyA secret number that proves you own the crypto in your wallet. Whoever holds the private key controls the crypto.. The keys never leave the device. When you send crypto, the transaction is signed inside the device and only the signature goes to your computer or phone.

How does a hardware wallet work?

You connect the device to a computer or phone, by cable or Bluetooth, and use the manufacturer's app. The app prepares the transaction but can't sign it. The device shows the amount and the wallet addressWallet addressA string of letters and numbers you give out to receive crypto, much like a bank account number. on its own screen, and you confirm by pressing a button on the device.

This matters. Even if your computer is infected with malware, the malware can't reach the keys. Always check the address on the device's screen against the correct address before you confirm.

A hardware wallet is the most common type of cold walletCold walletA way of storing the keys to your crypto completely offline, so hackers on the internet can't reach them.. Well-known makers include Ledger and Trezor.

What to watch out for

  • Buy directly from the manufacturer. A second-hand device, or one from an unknown seller, may have been tampered with.
  • The seed phrase should be created by the device when you set it up. If a list of words comes in the box, the device isn't safe to use.
  • Keep your seed phraseSeed phraseA list of 12 or 24 words that backs up every key in your wallet, so whoever has the words can restore the wallet and take the crypto. somewhere safe. If the device is lost or breaks, you can restore the wallet on a new one with the words. Without them, the crypto is gone.
  • Choose a good PIN. It protects the device if someone else gets hold of it.

Everything in Myntkaup Learn is written and regularly reviewed by the Myntkaup editorial team. It is for education and is not investment advice. Editorial policy. Updated 18 October 2026.