Research On Forward Secure Data Encryption And Integrity Audit Mechanism In Hybrid Cloud Environment

As a new computing model,cloud computing provides enterprises and individual users with convenient services based on their reliability,economy,and ease of operation.At the same time,it also brings security risks,such as the leakage of personal user privacy data,public cloud server interrupts,and various unknown attacks from the network.This causes most companies to give up their trust in the public cloud and turn to private cloud services.Although the private cloud guarantees the secure storage of its confidential and sensitive data,its storage scale,service capabilities,and openness cannot be compared with the public cloud.Therefore,hybrid cloud computing is the development trend of future cloud computing models.However,how to ensure efficient and secure data storage and data integrity has become a key issue for research.This paper focuses on the current status,background,and hidden security risks of current cloud services,and conducts in-depth research on related technologies of existing hybrid cloud storage solutions.The main research work is as follows:1.This paper proposes a new hybrid cloud model,introduces the concept of a transit cloud,and does more innovative design in terms of functionality,which improves the data transmission efficiency of the cloud server in the hybrid cloud model and improves the space utilization of cloud storage.2.Aiming at many problems existing in cloud storage data security,this paper proposes a new forward-updating hybrid cloud storage encryption scheme.Divide user's data into privacy data and non-private data.Public cloud is responsible for storing non-private data and Private cloud is responsible for storing private data.Prevent users from catastrophic loss caused by the loss of encryption keys and improve the privacy of user data.3.This article addresses issues with existing data integrity verification schemes,the paper proposes a BLS(Boneh-Lynn-Shacham signature scheme,BLS)short-signature,which is a bilinear pairing-based cloud data integrity verification scheme.Enables efficient dynamic integrity verification(adding,updating,and deleting)of cloud data,greatly shortens the length of signatures and improves the utilization of cloud storage space.Finally,after system testing,it is proved that the proposed scheme can guarantee the security and integrity of data.