Hide Large Size Files Based on Flash Memory's Bad Block Table

In order to quickly hide large size files in a flash memory under special circumstances and recover it at the appropriate time, storage characteristics of flash memory bad block table are used to hide and recover files. A file system based on flash memory is designed, the blocks of flash memory are located on according to these block's number are recorded to recover data, bad blocks are marked and hide the file. Simulation results show that, this method gets a better speed than file encryption method.