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Glossary

Cold Wallet

A cold wallet is a way of storing the private keys that control your crypto entirely offline, so they are never exposed to an internet-connected device.

How it works

Cold storage keeps keys on a device or medium that has no live network connection — commonly a dedicated hardware wallet, or even a paper backup of a seed phrase. To send funds, the transaction is signed on the offline device and only the signed result is broadcast, so the secret key itself never touches an online machine. Its counterpart, a hot wallet, stays connected for convenience.

Why it matters

Because most thefts happen through internet-connected software, keeping keys offline removes the largest attack surface. Cold wallets are the standard choice for holding larger amounts long term, with the trade-off of being less convenient for frequent transactions.

Example

Storing the bulk of your holdings on a hardware wallet kept in a safe is a typical cold-storage setup.

Cold Wallet: Frequently Asked Questions

What is the difference between a cold wallet and a hot wallet?
A cold wallet keeps private keys entirely offline, while a hot wallet stays connected to the internet for convenience. Because most thefts happen through internet-connected software, cold storage removes the largest attack surface. The trade-off is that cold wallets are less convenient for frequent transactions, whereas hot wallets are easier for everyday use.
How does a cold wallet sign transactions if it is offline?
The transaction is created and then signed on the offline device, and only the signed result is broadcast to the network through an online machine. This way the secret key itself never touches an internet-connected device. The offline signing step is what keeps the keys protected even when you are sending funds.
What happens if I lose my cold wallet device?
Losing the physical device does not have to mean losing your funds, provided you safely stored the seed phrase backup that the wallet generated. That phrase can restore your keys on a new device. If you lose both the device and the seed phrase, the funds are generally unrecoverable, so backups must be protected carefully.