Research On Cloud Computing Security Technology Based On Chaotic Encryption

With the advent of the era of big data,massive data information has brought huge challenges to the equipment at this stage,and it has also caused higher costs.The generation of cloud computing makes full use of existing technologies to combine all resources and use them on demand to reduce operating costs.Through cloud computing,users don't need to carry physical storage media,and can dynamically and flexibly acquire required data and resources from the cloud anytime and anywhere.However,the data leakage incidents caused by the mid-frequency of cloud computing make people discouraged.How to ensure the security of data in cloud computing environment and protect the privacy information in cloud storage is one of the hot research topics.Solving this problem has important practical significance for the application and promotion of cloud computing.For the security problems existing in the cloud computing environment,it is a reliable method to use encryption to enhance the security of secret communication.However,the traditional encryption method has not been found to be unbreakable.Chaotic cryptography are a new type of encryption.In recent years,there have been some good applications in hash functions,image encryption,digital watermarking,and other multimedia communications.This paper focuses on the privacy security of data in cloud computing environment combined with chaotic encryption.The main research work of the thesis is as follows:First,according to the data security cycle in the cloud computing environment,a system for secure cloud storage and sharing is proposed,and the overall architecture design of the system is given.A cloud server was built and the software architecture of each module of the system was introduced in detail.Secondly,based on the chaotic anti-control principle,a four-dimensional discretetime hyperchaotic system based on nonlinear nominal matrix is designed.The detailed design process is given,and the four-dimensional discrete-time hyperchaotic encryption algorithm is further designed by using the pseudo-random sequence generated by the chaotic system.It also proves that the system can achieve self-synchronization.Then,according to the difference between the user's requirements for private data and non-private data,the WeChat applet is used to perform chaotic encryption on the privacy data to be uploaded to the cloud server according to the user's dynamic selection,and the non-private data is directly uploaded and stored in the cloud.Data security is guaranteed to be stored in the cloud,saving computing resources compared to full encryption.At the same time,the RSA encryption algorithm is used to encrypt and share the private data stored in the cloud to achieve the effect of identity verification.Finally,the experiment was completed on the experimental platform,and a series of security analysis was carried out on the four-dimensional discrete-time hyperchaotic encryption algorithm designed in this paper.It proves that the algorithm has good resistance to various password attacks.The implementation results also show that the system proposed in this paper can better guarantee the data security in the transmission process and cloud storage.