Abstract:This paper proposes a new cloud-oriented based on the problems of poor security and low efficiency of traditional image encryption schemes.This scheme uses the widely recognized chaos technology in the field of image encryption,and uses 2D-LASM,a two-dimensional chaotic mapping formula that has been proven to have excellent chaotic performance.It adds modulation operations to the pervasive permutation—diffusion model and enhances safety.At the same time,the cloud computing model is used to transfer part of the encryption process to the cloud server.While avoiding cloud threats,it makes full use of cloud computing capabilities and improves computing efficiency.The security and performance analysis of the scheme shows that the scheme has good security and excellent performance.