【#Cryptography Security Tips】After my wallet was stolen, I understood that "the mnemonic phrase is not a backup, it is a lifeline".
I used to think that writing the mnemonic phrase in a notebook was very safe, but one day, the notebook was cleaned out by my family, and the mnemonic phrase, along with my assets, disappeared forever.
This happened in 2022 when I participated in an NFT mint using a hot wallet, and the ETH in the address skyrocketed. But when I wanted to transfer, I found out that the wallet could not be restored, and that mnemonic phrase was long gone.
⸻
🔐 The five security rules I learned:
1️⃣ Writing the mnemonic phrase on paper is not enough; you should "store it in multiple places separately" or use a metal plate for engraving.
2️⃣ Hot wallets (like MetaMask) are convenient to use but can easily be attacked by phishing sites.
3️⃣ Cold wallets (like Ledger, Trezor) are cumbersome but are the real safe for long-term assets.
4️⃣ Use multiple wallets: one for transactions, one for savings, one for NFTs.
5️⃣ Enable two-factor authentication (2FA) and use a strong password manager (like Bitwarden).
⸻
💡 Now I use a "hot and cold wallet combination":
• Hot wallet for daily interactions and DeFi operations.
• Cold wallet to store main assets and private keys, usually unplugged and not connected to the internet.
⸻
👥 Advice for beginners:
Never think that "my assets are small, so I don’t need to care about security"—hackers do not target wealthy individuals, they target vulnerabilities.
