Improvement of Cloud Computing Medical Data Protection Technology Based on Symmetric Encryption Algorithm

Abstract

Abstract The traditional data-protection method has the advantages of a long average secrecy time and low encryption efficiency in healthcare. This paper proposes an improved method of cloud-computing data-protection technology based on a symmetric encryption algorithm. According to the characteristics of cloud computing, a trusted communication channel for virtual machine monitoring is established on users and servers. The cloud-computing data-protection technology with four functional modules of “multi-copy protection,” “file access,” “integrity verification,” and “accountability” is deployed in the channel by using the improved symmetrical encryption differential-algebraic equations algorithm combined with the symmetrical encryption algorithms data encryption standard and advanced encryption standard to do the following: bind the identity of cloud-service providers; realize mixed encryption of plaintext segmentation; and add random interference information. These clusters are built on Hadoop to simulate the cloud-computing environment. The experimental results show that the average encryption and decryption times of this method are the best under different data amounts. At the same time, the encryption efficiency and throughput are over 95 %. The protection effect of this method on cloud-computing data is verified.