Lightweight mirror image file encryption system and method

Abstract

The invention discloses a lightweight mirror image file encryption system and a lightweight mirror image file encryption method and belongs to the technical field of cloud computing of computers. A mirror image file in a cloud computing system is encrypted, stored and managed. The encryption system comprises a key management module, a mirror image file block management module, an encryption / decryption module, a pseudo partitioning management module, a database and a background storage system. The encryption method comprises a key acquisition stage, a mirror image file partitioning stage, a mirror image file storage stage, a mirror image file reading stage and a pseudo partitioning maintenance stage. The mirror image file block management module is used for equally segmenting all mirror image files and then protecting the mirror image files through an encryption block mapping table. The safety of the mirror image files is ensured, and the encryption / decryption time cost is lower. Meanwhile, by creating and managing pseudo blocks in an idle storage space, the possibility of brute force is further reduced, and the safety is improved. The lightweight mirror image file encryption system and the lightweight mirror image file encryption method are applicable to any cloud computing system relating to mirror image file management.

Description

technical field [0001] The invention belongs to the field of computer cloud computing, and in particular relates to a lightweight image file encryption system and method. Background technique [0002] Because of the advantages of easy deployment and high scalability, cloud computing is more and more widely used in enterprises, and it is gradually replacing traditional IT infrastructure. Compared with traditional IT infrastructure, cloud computing has incomparable advantages in many aspects: 1) It does not need to maintain a fixed IT infrastructure, but leases cloud resources on demand according to the actual business volume. High flexibility and lower investment compared with fixed IT infrastructure. 2) Because there is no need to maintain a fixed IT infrastructure, there is no traditional IT maintenance cost, and some software can even be shared to reduce software costs. Therefore, compared with traditional IT infrastructure, the maintenance cost of cloud computing is als...

AI Technical Summary

Problems solved by technology

However, compared with ordinary files, image files are relatively large, so the encryption and decryption operations on the entire image file will bring a very large extra time overhead for access operations, which has a great impact on the overall performance of the system

In particular, the image file stores key software including the operating system, and these software are necessary when the virtual machine is running. The time overhead of image file access operations will have a greater impact on the performance of the virtual machine.

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