Phison Electronics Corporation

Hon-Wai Ng

Yi-Hsiang Huang

Hsiang-Hsiung Yu

Shih-Hsien Hsu

Shu-Hua Wang

Chung-Hsun Ma

Chin-Ling Wang

A flash memory storage system including a flash memory chip, a connector, and a controller is provided. The flash memory chip has a plurality of physical blocks. The connector is configured to couple to a host system. The controller is coupled to the flash memory chip and the connector. The controller configures a plurality of logical blocks and maps the logical blocks to a portion of the physical blocks. In addition, the controller identifies rewritable disc commands from the host system and writes data from the host system into the physical blocks mapped to the logical blocks according to the rewritable disc commands. Thereby, a rewritable disc device is simulated by using the flash memory storage system.

Flash memory storage system for simulating rewritable disc device, flash memory controller, computer system, and method thereof

The present invention discloses a data access method accomplished by the following steps of: creating a predetermined password; generating a first encryption key; encrypting data based on the first encryption key; prompting for the predetermined password upon receipt of an access request; decoding a header of the NAND flash memory based on a user-entered password; examining the header to determine whether a mapping between the user-entered password and the first encryption key is defined; and decrypting and outputting the data by a decryption key when the mapping between the user-entered password and the first encryption key is defined.

Data access method against cryptograph attack

Growing community of inventors

Miaoli, Taiwan

Hon-Wai Ng