Method and apparatus for data protection of memory device

Abstract

The present invention discloses a method for protecting the data of a storage device. An analogical HPA area is divided from the partition of the storage device and the mark position of the corresponding record in the partition table of the analogical HPA area is marked as bad, so as to store the special data to be protected in the analogical HPA area. In the process of computer BIOS power-on self-examination, the computer calculates the initial address of the analogical HPA area by obtaining the terminal address of the analogical HPA area and obtains the special data stored in the analogical HPA area. The method provided by the present invention ensures that the special data stored in the storage device analogical HPA area is no longer dependent on the safety of MBR for protection.

Description

Technical field [0001] The present invention relates to the technical field of computer security, in particular to a method and device for protecting data in a storage device. Background technique [0002] With the development of computer technology, especially the continuous emergence of large-capacity storage devices, people have higher and higher requirements for the security of data stored on storage devices. Many PC manufacturers will provide different programs. Before the operating system is started (PreOS), the condition of the user's computer is detected through the trigger of the system hot key or automatic judgment, and then the above-mentioned program executes the corresponding operation. [0003] Since the capacity of current storage devices is relatively large, in order to save costs, the program is generally stored in the storage device. At present, there are mainly two methods in the industry: one is the Host Protected Area (HPA) method. In this method, the storage...

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Problems solved by technology

But this method also has certain problems, using the Readmaxaddress (ext) and Setmaxaddress (ext) instructions in the ATA / ATAI6 instruction means that the storage device needs to be customized to use this method, which increases the cost; The execution of the above instructions by the storage device involves the correlation between the motherboard and the storage device, and the manufacturer's program needs to be customized and upgraded for different motherboards; at the same time, it is difficult for users to use third-party tools to clear the HPA

[0004] Another method in the current industry is to store the manufacturer's program in a certain partition of the storage device, which is marked as 12H or 1CH (or other industry-specified values) in the master boot record (MBR, Master Boot Record). In this way, the operating system will think that the partition is a hidden partition. Although it can be seen in the disk manager that the partition is of the Extended Industry Standard Architecture (EISA, Extended Industry Standand Architecture) type, there is no way to operate it, and the Bootloader is stored in the MBR. , the Bootloader program will be called when the BIOS ends

The disadvantage of this method is that it relies too much on the MBR, and the MBR lacks the necessary protection and is easily damaged; at the same time, such a hidden partition is easy to be mounted, resulting in the visibility of the manufacturer's program and loss of protection; at the same time, the structure stored in some manufacturer's programs is easy to be cracked

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