Glossary · Security

What is Seed phrase?

A seed phrase is the master key in human form: twelve or twenty-four words from which a wallet derives every key it will ever hold. Whoever can read the phrase can spend everything it covers; whoever cannot, cannot. There is no bank to call.

The operational rules are old and unforgiving: write it on something that does not burn, keep it where floods and visitors cannot reach, never photograph or type it into anything connected, and never share it with anyone, including support, ever.

Seed phrase on U.CASH

U.CASH is non-custodial: your seed phrase never enters the platform. The U Account model offers its own recovery path for everyday flows while pure wallet flows keep full self-custody, and the choice stays yours.

See also

Non-custodialCold wallet

Seed phrase: FAQ

What if I lose my seed phrase?
For pure wallets, the funds are unrecoverable, that is what non-custodial means. Backups exist to be made before they are needed, not after.
Can I change my seed phrase?
Not in place: you generate a new wallet and move the funds. Treat any 'rotate your seed' prompt as an attack by default.
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The glossary, A to Z

Every term behind the rails, the assets, and the settlement.