Research On Method Of Data Privacy In Cloud Storage Environment Of Smart Grid

Smart grid in the deployment of a variety of monitoring systems and advanced monitoring system,the device to obtain and transmit various types of data exponential growth occurs,the entire grid at any time the mass of important data will be centralized to the remote terminal unified management,large amounts of data frequently Collection,transmission brings network congestion at the same time more on the power grid communication real-time,accuracy and safety of the new requirements.Cloud storage systems can provide massive storage capacity to solve the problem of large data storage in smart grids.With the development of cloud computing,cloud security has become an increasingly critical issue.In a cloud computing environment,users lose control over the data and calculations placed in the cloud server,and it is uncertain whether or not the data is protected and whether the computational tasks are performed correctly.Therefore,in the smart grid cloud storage system data security is an urgent need to solve the problem.This paper mainly studies the data privacy protection scheme in the cloud storage system of the smart grid,and completes the following work:(1)First,an improved integer-based scheme for homomorphic encryption is proposed.Based on the DGHV scheme,the size of the public key is reduced to O?(?4)by using the public key element quadratic technique and the parameter offset technique.Then,by changing the modulo 2 operation to modulo 2~k operation,the improved scheme can encrypt the data of k bits at a time,which has smaller public key size and higher efficiency than the original DGHV scheme.Finally,the correctness and security of the scheme are proved,and the efficiency analysis of the scheme is given.(2)Then,a secure storage scheme is proposed to guarantee the confidentiality and integrity of data in the smart grid.In this scheme,the ciphertext and key separation are managed,and the key is encrypted with the homomorphic encryption algorithm to ensure the security of the key.The ciphertext of the key is encrypted in the cloud according to the improved Merkle Tree Processing to ensure the integrity of the data,effectively guarantee the confidentiality and integrity of data and reduce the safety of storage space overhead and time overhead.Finally,the correctness,validity and feasibility of the scheme are proved theoretically.(3)Finally,a small-scale Spark cluster platform and a distributed database HBase are built on the existing equipment of the laboratory.The prototype system of smart grid cloud storage is developed on the cluster platform,which realizes the safe storage of the smart grid data.