Electronics and Telecommunications Research Institute

Jaemyoung Kim

Seokhyun Kim

Sangho Yi

Seungmin Park

Yookun Cho

Donghyouk Lim

Jaeheung Lee

Jinha Oh

Yungjoon Jung

Jisung Jung

Youngbin Seo

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

Disclosed is an apparatus and method of mirroring firmware and data of an embedded system. The embedded system mirrors a boot loader image, a kernel image, a RAM disk image and data that are stored on a main flash memory to be operated onto a secondary flash memory. Therefore, when a main flash memory does not normally work, the firmware and data that are stored on the main flash memory to be operated is mirrored onto the secondary flash memory, which prevents the loss of data and maintains the operation of the embedded system. As a result, it is possible to secure the reliability and operability of the system.

Apparatus and method of mirroring firmware and data of embedded system

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Daejeon, South Korea

Jaemyoung Kim