Hackers' tricks are endless. Recently, a clever tactic is to fake QR codes of legitimate projects to lure users into scanning and opening phishing websites. Once you accidentally enter your wallet password or click "Approve All," your assets are instantly transferred away. SlisBNB holders have been frequently targeted recently, suffering heavy losses.

It may seem impossible to defend against, but there are actually solutions. The key is to understand the attack chain of hackers: they need you to perform operations on an insecure device. What if you could break this chain?

**Device isolation strategy is actually very simple.**

Prepare two phones. The first is the "observation device," which holds no assets and is used solely for scanning QR codes, clicking links, and browsing untrusted websites. When you see an airdrop or investment opportunity, first use this phone to explore. Confirm that the link is genuine, the domain spelling is correct, and the official community has verified it before proceeding.

The second is the "cold phone," which only has your wallet installed and stores your main assets. Keep it offline most of the time. Only after you have fully verified the legitimacy of the operation on the first device do you take out the second phone to perform transfers or sign transactions. This way, even if the first device is remotely controlled by hackers, they cannot steal your real assets.

**But device isolation alone isn't enough; hardware wallets are the final line of defense.**

Use hardware wallets like Ledger or Trezor. They have a dedicated physical screen unaffected by your phone or computer system. When you need to sign a transaction, the specific transaction details are displayed on the hardware wallet's screen, not on your phone. This means that even if hackers compromise your device and tamper with the displayed content, the real transaction details shown on the hardware wallet's screen cannot be altered.

For example, if your phone shows "Transfer 1000 USDT," but the hardware wallet displays "Transfer 10000 USDT to an unknown address," you know something's wrong and can refuse to sign.

**In summary, the most secure approach is: device isolation + hardware wallet double protection.** Perform daily operations and verification on the observation device, and manage assets with the hardware wallet. Both layers of protection are indispensable. No matter how cunning malicious QR codes or phishing sites are, they are difficult to bypass this defense system.