Abstract: A trust model of cloud identity management based on blockchain technology is proposed. The trust model allows cloud service providers to manage their trust relationship in a dynamic and distributed way without the need for centralized management organizations such as IDP. Through an effective authentication mechanism, the model allows data distributed across multiple domains to use identity information to streamline the opeartions and optimize user experience. It provides a referential solution for the security and privacy of cloud identity management. By comparing with the traditional cloud identity management model, the stability of the design is proved.

Key words: blockchain, trust, information security, cloud technology, identity management