A Secure Erasure Method for Fragmented JPEG Images
Xu Chang · 2024
Data has become a fundamental factor of production and a core strategic resource for the country. Data security has become a major issue related to national security and economic and social development, as well as the protection of personal privacy data. This article proposes a secure erasure method for JPEG images stored in fragmented storage by analyzing the storage, deletion, and recovery of data under different file systems, the causes of file fragmentation, and the principles and algorithms of data erasure. Using file system structure to locate data, using multi-level erasure algorithm to overwrite data, and performing data deletion and structural adjustment on the system structure information of the corresponding file system to achieve secure erasure of JPEG image files. The experimental results show that the proposed method is capable of securely erasing fragmented JPEG image files, has the ability to prevent recovery, and has high practical value.