A data protection method and system for a solid-state hard drive

Abstract

The present invention relates to a data protection method and system of a solid-state hard disk; wherein, the method includes: S1, acquiring command information issued by a host; S2, judging the command information; S3, randomly generating two sets of random numbers; S4, setting a password ;S5, read symmetric key from area 1; S6, write digest to area 3; S7, write data; S8, read symmetric key from area 2; S9, input password; S10, read Symmetric key and password digest; S11, decrypt the password digest; S12, compare digest 1 with digest 2; S13, decrypt ciphertext data; S14, user access data; S15, randomly generate two sets of random numbers; S16 , to erase the data in area 1, 2, 3, 4. The invention improves the security of the protected data by dynamically switching the random number secret key, and ensures the stability of the protected data by erasing and rewriting the protected data.

Description

technical field [0001] The present invention relates to the technical field of data protection of solid-state hard disks, and more particularly to a data protection method of solid-state hard disks and a system thereof. Background technique [0002] The existing data protection strategy for solid-state drives needs to open up two areas in NandFlash. Area 1 is used to store the password set by the user, and area 2 is used to store the data that the user needs to protect. Before writing data, the user needs to set the A set of passwords is written in area 1. When the user reads the protected data, the password needs to be verified. If the passwords are the same, the user can access the protected data Data in NandFlash; however, the access methods for the above protected data are as follows Disadvantages: 1. Passwords and data are stored in plain text, and the passwords stored in area 1 remain unchanged, with low security; 2. Once the SSD controller is cracked and the controlle...

AI Technical Summary

Problems solved by technology

[0002] Currently, for the data protection strategy of the solid-state hard disk, two areas need to be opened in NandFlash, area 1 is used to store the password set by the user, and area 2 is used to store the data that the user needs to be protected; before the user writes data, it is necessary to set A set of passwords is written in area 1. When the user reads the protected data, the password needs to be verified. If the passwords are consistent, the user can access the protected data Data in NandFlash; however, the access methods for the above-mentioned protected data are as follows Disadvantages: 1. Passwords and data are stored in plain text, and the passwords stored in area 1 remain unchanged, with low security; 2. Once the controller of the SSD is cracked and the controller runs illegal codes, hackers can Skip the password verification process and directly access the protected data area in Nandflash; 3. Due to the unstable characteristics of NandFlash, the protected data in NandFlash area 2 is prone to bit flipping, and the data will be in an unreliable state; therefore, it cannot meet the requirements

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