Electronics and Telecommunications Research Institute

Jinha Oh

Seokhyun Kim

Sangho Yi

Seungmin Park

Yookun Cho

Jaemyoung Kim

Donghyouk Lim

Youngbin Seo

Jaeheung Lee

Yungjoon Jung

Disclosed is a flash memory device having a secure flash file deletion function and a method for securely deleting a flash file. Data and object headers as actual contents of the flash file are separately stored in data blocks and header blocks. At this time, the data is encrypted and stored, and a decryption key is included in an object header and stored in a header block. When the flash file is deleted, the object header is deleted by searching the header block where the object header including the decryption key is stored. In order to search the header block, a binary tree structure is used in which a terminal node indicates an LSB of a file ID. Disclosed may be applied to an embedded system where a flash memory is used as a storage medium. In particular, disclosed is suitable for a NAND flash memory device.

Flash memory device having secure file deletion function and method for securely deleting flash file

Growing community of inventors

Daegu, South Korea

Jinha Oh