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Hardware Wallets

Use a hardware wallet (Ledger, Trezor) to sign transactions safely. Hardware devices keep private keys offline and require physical confirmation for actions — ideal for valuable NFTs.

Phishing & URLs

• Always check the domain: opensea.io is official.
• Beware of lookalike domains and social DMs promising giveaways.

Signatures vs Transactions

Understand what you sign: authentication signatures only verify wallet ownership. Transaction signatures authorize movement of funds — never sign a transaction you don't expect.

Permissions & Approvals

When using third-party marketplaces, periodically revoke old approvals (via Etherscan or wallet interfaces) to reduce risk of unauthorized spending.