Top Blockchain Security Practices

Utilize hardware wallets for long-term storage. For significant amounts, move funds off exchanges to a hardware wallet and store your seed phrase offline in multiple secure locations. "If you’re holding long-term, move most funds to a hardware wallet, store your seed phrase offline in two secure locations, and avoid checking prices daily".

Implement a passphrase with a decoy wallet. Use an extended passphrase to protect the majority of your funds, keeping a small amount in a decoy wallet to detect compromise early. "Make use of a passphrase and a decoy wallet. Leave some sats in the wallet protected only by the seed and the rest in the wallet protected by the passphrase.".

Never store seed phrases digitally. Write down your seed phrase on paper or engrave it on metal, and keep it physically separate from your devices. "Never store it digitally. No photo, no cloud backup. Save it by hand on paper or, better yet, on metal.".

Be wary of unsolicited private messages and phishing attempts. Scammers often target individuals with complex schemes via private messages or fake login pages. "Anyone sending you private messages is usually someone trying to find a long, complicated method of trying to steal your cash / crypto.".

Recognize that the human element is the weakest link in security. Many attacks exploit user vulnerabilities rather than the underlying blockchain technology. "The human is always the weakest link".

Understand that blockchain security doesn't prevent all attacks. The core blockchain may be secure, but attacks often target infrastructure like exchanges or individual user accounts. "Blockchain may theoretically be secure, but in practice there are many many ways for it to fail.".

Conduct thorough security audits for smart contracts. Audits should cover code, architecture, access control, and integrations, followed by fixing and re-auditing critical issues. "Auditors review the code manually, run automated analysis (static tools, fuzzing), test edge cases, and try to break core assumptions.".

Prioritize key management. Proper key management is essential for the security of actual blockchains, applications, and smart contracts. "However with all of these I think good key management is very important.".

Freeze code before an audit. Ensure the code is stable and documented prior to a security audit to define the scope clearly and facilitate thorough review. "Freeze code before audit".