Self-Custody
Holding your own private keys, giving you full control over your cryptocurrency without relying on a third party.
In short: Self-custody means holding your own private keys, giving you full control over your crypto without relying on any third party.
"Not your keys, not your coins" is a common phrase in crypto. Self-custody means you hold your own private keys using a software or hardware wallet. No exchange or company can freeze your funds or deny you access.
The responsibility is also yours. If you lose your seed phrase or private key, nobody can help you recover your funds. There's no "forgot password" button. For this reason, self-custody is recommended for larger holdings, while keeping smaller amounts on exchanges for convenience is a common approach.
Hardware wallets like Ledger provide the strongest form of self-custody because the private keys never leave the physical device.
Related Terms
Wallet
Software or hardware that stores your private keys and lets you send, receive, and manage cryptocurrency.
Custodial Wallet
A wallet where a third party (like an exchange) holds your private keys on your behalf.
Private Key
A secret cryptographic code that proves ownership of a blockchain address and authorizes transactions.
Seed Phrase (Recovery Phrase)
A set of 12 or 24 words that can restore your crypto wallet and all its private keys. Also called a recovery phrase or mnemonic.
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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.