Private Key
The secret number that authorises spending from a crypto address.
✦ Key Insight
Possession is ownership. There is no separate identity check, so a leaked key means immediate and irreversible loss.
✕ Common Misconceptions
Pasting a key into any website or app that asks for it — no legitimate service ever needs it. Also storing keys in screenshots, password managers with weak master passwords, or cloud notes.
Detailed Explanation
In Practice
Dig Deeper
Wallet
Software or hardware that stores your private keys and lets you sign transactions.
Token
An asset created by a smart contract on an existing blockchain rather than being that blockchain's native currency.
Blockchain
A shared, append-only record of transactions maintained by many independent computers at once.
Transaction
A blockchain transaction is a signed or authorized instruction that changes blockchain state or transfers value when accepted by the network.