Secure Data Sanitization for Android Device Users
Na Huang, Jingsha He, Bin Zhao · International Journal of Security and Its Applications · 2015
To protect the data confidentiality of Android device users, this paper proposed a user-level secure data sanitization method which can make sensitive data stored in flash memory unrecoverable.The proposed method using reversed-scanning algorithm to reduce time and it don't need overwriting or erase the whole flash memory.After sensitive data pages are found, the program targetedly overwriting some blocks, erase them, and insert them into free block list waiting to be located again which means the blocks will be twice overwrited by new data.