Multi-matrix combined public key based on big data system key management scheme

With the advent of the era of big data, Large-scale data is stored in the cloud, and data security and privacy become more and more important. Key management, as an important part of big data security mechanism, faces the problem of scale demand. A multi-matrix combined public key based big data system key management scheme is proposed in this paper. Key matrix is divided into several little matrixes according to the identity of user, which can resist collusion attack. Key distribution, key updating and key agreement is designed thoroughly. Through security analysis and performance analysis, we can conclude that multi-matrix combined public key based big data system key management scheme has many remarkable characteristics such as high efficiency and security.