Public Keys, Private Keys and Crypto Addresses

By QBMFX Academy · Updated 20 October 2026 · Editorial standards

A private key is secret authorization material; a public key is mathematically related information used in verification. An address identifies a network-specific destination or account under that network’s rules. They are not interchangeable.

How it works

Wallets may derive many keys and addresses from a recovery seed. The exact derivation and address format vary. A signature can prove authorization without revealing the private key, but signing an unreadable or misleading message can still grant dangerous permissions. A public address is not proof of a person’s legal identity.

Worked example

Alice shares a receiving address with Bob, who sends funds to it. Bob does not need Alice’s private key, recovery phrase or wallet password. If a supposed support agent says the phrase is needed to “activate” receiving, the request is a theft risk rather than a normal transaction requirement.

Amounts, prices and scenarios are fictional teaching examples. They exclude any effects not explicitly stated and are not trade recommendations.

Limits and common mistakes

A lost private key may be unrecoverable without an existing backup or alternate authorized path. Addresses can be copied incorrectly or substituted by malware. Never put real secrets into an exercise, screenshot, chat or example generator.

Knowledge check

Can someone spend funds merely because they know a normal receiving address?

Read the explanation

Not under the standard key-based authorization assumption. Spending requires the relevant authority, though privacy exposure, contract permissions or an already compromised key can introduce other risks.

References and further reading

These sources explain the underlying concepts and specifications. They do not endorse QBMFX Academy. Check the relevant market, protocol version and reporting rules before applying an example.