Method for Constructing Trusted Storage System Using Flash Device and Constructed Trusted Storage System

Abstract

The present invention proposes a method for constructing a trusted storage system using flash memory devices and the trusted storage system constructed. The trusted storage system has two flash memory devices, and their flash conversion layers are developed independently and do not share the design with each other; when the host sends a write request , the controller calculates the check code of the data to be written and stores it in the check code table, and the data and its logical page number are passed to the two flash memory devices for storage; when the host sends a read request, the controller passes the logical page number to the Two flash memory devices, the two flash memory devices return data to the controller respectively, the controller calculates the check codes of the two data respectively and compares them with the check codes of the page number in the check code table, if they are inconsistent, notify the host flash device Untrustworthy, if at least one of them is consistent, transmit the data to the host. The invention uses two independently produced flash memory devices to calculate and record check codes when writing, and recalculate and verify check codes when reading, thereby improving the security of user information.

Description

technical field [0001] The invention relates to the technical field of computer information storage, in particular to a method for constructing a trusted storage system by using a flash memory device and the constructed trusted storage system. Background technique [0002] The growing gap between the CPU processing speed and the reading and writing speed of storage devices has always been a challenge for computer development. SSD, etc.) development trend. Flash memory devices are widely used in personal devices such as MP3, mobile phones, tablet computers, notebook computers, workstations, servers, and government and military communication equipment, etc. Compared with disk-based storage devices, flash memory devices have lower read and write latency, Lower power consumption, and better impact resistance. [0003] However, the flash translation layer (FTL, Flash Translation Layer) of the flash memory device is developed by the manufacturer and is protected as an intellectu...

AI Technical Summary

Problems solved by technology

[0003] However, the flash translation layer (FTL, Flash Translation Layer) of the flash memory device is developed by the manufacturer and protected as an intellectual property, and users cannot know its design details

Considering that the manufacturers are all foreign companies, users cannot know whether the design has a hidden back door. If the design has a hidden back door and is triggered under certain conditions, it will actively destroy the data, and there is no guarantee that the data and The security of the system poses a great threat to the information security of users

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