An Efficient Secure Deletion Scheme for Flash File Systems
Jaeheung Lee, Sangho Yi, Junyoung Heo, Hyungbae Park, Sung Y. Shin, Yookun Cho · Journal of information science and engineering · 2010
Secure deletion for flash file systems is essential for enhancing the security of embedded systems. Due to the characteristics of flash memory, existing secure deletion schemes cannot be directly adapted to flash file systems. In this paper, we propose an efficient secure deletion scheme for flash file systems. It encrypts a file's data and stores all keys of the file in the same block. This ensures that a single erase operation is sufficient to securely delete a file. Experimental results show that our scheme significantly reduces secure deletion overhead compared with the simple encryption scheme.