Idiom idiom
Private Key
Meaning
A secret cryptographic number that proves ownership of crypto assets and authorizes transactions.
Examples
“Never share your private key with anyone.”
“The thief drained her account after finding the private key written on a sticky note.”
“Because a private key cannot be guessed, losing it means losing access to the funds forever — there is no reset button.”
Origin
disputed origin
disputed origin
Cryptography term: private (secret) + key (unlocking mechanism).
Last updated July 19, 2026