Cold Storage
Keeping cryptocurrency keys completely offline, disconnected from the internet, for maximum security.
Cold storage is the most secure way to hold crypto. Your private keys never touch an internet-connected device, which means hackers can't access them remotely. Hardware wallets (like Ledger) are the most common form of cold storage.
Other cold storage methods include paper wallets (private key printed on paper), steel plates (seed phrase engraved in metal), and air-gapped computers that have never been connected to the internet.
Cold storage is recommended for larger USDC holdings that you don't need to access frequently. The trade-off is convenience: you need physical access to the device to make transactions. Many people use a combination, keeping smaller amounts in a hot wallet for daily use and larger amounts in cold storage.
Related Terms
Hot Wallet
A cryptocurrency wallet connected to the internet, offering convenience but more exposure to potential hacks.
Hardware Wallet
A physical device that stores cryptocurrency private keys offline. The most popular form of cold storage.
Self-Custody
Holding your own private keys, giving you full control over your cryptocurrency without relying on a third party.
Private Key
A secret cryptographic code that proves ownership of a blockchain address and authorizes transactions.
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This definition is provided for educational purposes. USDC.org is an independent resource and is not affiliated with Circle Internet Financial.