As people's concerns about data privacy intensify, blockchain technology is expected to become the foundation for decentralized identity authentication. In 2024, some projects have begun to explore the use of blockchain technology for identity authentication, ensuring that users retain control over their data. By 2025, the application of blockchain in the fields of digital identity and privacy protection will become more mature, and decentralized identity authentication (DID) will enable individuals to manage their digital identities and privacy data autonomously, preventing privacy leakage and abuse.