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Because of the openness of the cloud storage architecture and the sharing of resources, data owners have lost control of the stored data, leading to frequent leakage of user privacy data, and security issues have been a significant element restricting the development of cloud storage. In this paper, three key algorithms for key distribution, hybrid encryption and dynamic key update are proposed for the key issues of data sharing security in cloud storage environment. Based on the above algorithms, a data security sharing model in cloud storage environment is proposed to solve cloud storage Trust dependence, user collusion attacks, and data dynamic security issues in the environment to protect private data during storage and sharing security. The analysis of the experimental results shows that the data security sharing technology can resist selective plaintext and collusion attacks. Therefore, the system of cloud storage encrypts shared data by using data security sharing technology, which can effectively protect the data confidentiality under context of the cloud storage.
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