In the rapidly evolving web3 ecosystem, defense strategies encompass a range of techniques from basic security protocols to advanced security frameworks. These strategies are vital for safeguarding decentralized networks and applications against various attacks, including DDoS attacks, phishing scams, smart contract vulnerabilities, and data breaches. Effective defense strategies might include implementing multi-signature wallets, rigorous audit processes, and employing decentralized oracle networks for enhanced data verification and reliability.