Blockchain is secure, but your wallet operations might not be.

Imagine this scenario: the development team of a top DeFi protocol's computer is infected with malware, and their GitHub repository is tampered with. Hackers secretly embed a counterfeit contract address during the next frontend update. When you habitually click the "Authorize" button, you think you're performing a normal operation, but in fact you're granting all assets in your wallet to the attacker. Hours later, billions of assets vanish instantly. Your wallet doesn't alert you because you signed it yourself.

This is a hypothetical situation, but it reflects a real risk: smart contract code stored on-chain cannot be tampered with, but the frontend website can be hacked. That's why "blind signing" is much more dangerous than you might think.

If you want to protect yourself, you need to establish a set of "zero-trust" interaction rules:

**Rule 1: Never trust the contract address in pop-up windows.** Save the core contract addresses of the protocols you interact with (such as lending contracts, liquidity pool contracts) locally in advance. Before signing each time, compare the last few digits of the address in your wallet popup to ensure they match.

**Rule 2: Completely reject unlimited approvals.** The "Approve Unlimited" option may seem convenient, but it carries great risk. Only authorize the amount you truly need for the current operation. Doing multiple transactions isn't trouble—it's responsible for yourself.

These two rules may seem troublesome, but compared to being hacked once, this small complexity is totally worth it.