FLASH MEMORY DEVICE HAVING SECURE FILE DELETION FUNCTION AND METHOD FOR SECURELY DELETING FLASH FILE

摘要

A flash memory device having a secure file deletion function and a method for securely deleting a flash file are provided to store encoded data and a decoding key in a separate memory block and disable recovery of the encoded data through deletion of the decoding key, thereby guaranteeing quick and secure deletion of a flash file. An end node having the same binary value as LSB(Least Significant Bits) of file ID of a flash file which is a deletion target is searched(S120). A header block indicating the end node is copied to a DRAM(Dynamic Random Access Memory). An object header having the file ID of a deletion target file is set invalid(S140). Effective object headers are stored in the header block(S150). The copied header block is deleted from the DRAM(S160).