Other

Electronics and Telecommunications Research Institute

Yookun Cho

Seokhyun Kim

Sang Lyul Min

Sung-Kwan Kim

Sangho Yi

Seungmin Park

Donghyouk Lim

Joosun Hahn

Jaemyoung Kim

Youngbin Seo

Jaeheung Lee

Jinha Oh

Jin Hyuk Yoon

Yungjoon Jung

A system for processing a read request for maximizing host read performance in a flash memory-based storage device is provided. The system for processing the read request solves a bottleneck phenomenon caused by a processor by adding an independent automatic read request processor, different from a conventional system in which a processor of a storage device processes the read request. Also, when processing the read request, a storage device using a write buffer may control a process of merging data of the write buffer and a flash memory and transmitting the data to a host based on a descriptor array, thereby minimizing processor overhead.

System and method for processing read request

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

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Seoul, South Korea

Yookun Cho