Blockchain is the key technology for Web 3.0 to build trusted interconnections and value interconnections. As a new decentralized infrastructure, the technology of blockchain is also constantly evolving. Combined with the background of Web 3.0, the technological progress and existing problems of blockchain are introduced in this paper, such as decentralized identity, smart contract, incentive mechanism, and privacy protection. They help to realize the technologies in Web 3.0, such as the data security sharing, business circulation and rights guarantee of users, so as to achieve the goal of more fair distribution and flow of the value.

Web 3.0  /  decentralized identity  /  smart contract security  /  incentive mechanism  /  privacy protection