Free courseBeginner15 minStay Safe
Wallet Security
In crypto there is usually no bank to call if something goes wrong. This module shows you how wallets work, how to guard your seed phrase and keys, and the simple habits that stop most thefts before they happen.
- 1Custodial vs self-custody, hot vs cold walletsWho holds your keys? Learn the difference between custodial and self-custody wallets, and between hot and cold (hardware) wallets.3 min
- 2Seed phrases and private keys: how to keep them safeYour seed phrase is the master key to your crypto. Learn what it is, how to back it up offline and why you must never share it or type it online.3 min
- 3Check every address: address poisoning and test transactionsCrypto transfers cannot be reversed. Learn how address poisoning works, how to check addresses properly and why a small test transaction helps.3 min
- 4Token approvals and how to revoke themWhen you use apps on a blockchain you often approve them to spend your tokens. Learn the risks of unlimited approvals and how to revoke them.3 min
- 52FA and phishing hygiene for crypto accountsProtect exchange and email accounts with app-based 2FA instead of SMS, and learn the daily habits that defeat phishing links and fake messages.3 min
Education, not investment advice. Crypto prices can fall sharply and most retail traders lose money. Practice in DUKOIN uses virtual USD with no real value.