The blue-core antivirus card directly takes over the control of hard disk reading and writing, and then connects with the motherboard through the PCI-E interface (there is also a PCI version), so that the antivirus card has the technical possibility of fundamentally controlling disk access.
Blue-core antivirus card adopts hardware-level recovery protection technology to protect protected partitions and data from various known or unknown viruses.
Blue core antivirus card is divided into several versions: popular version, professional version and deluxe version. The popular version is more suitable for individuals, Internet cafes, hotels and offices. Professional edition and deluxe edition are more suitable for schools, government agencies, large enterprise groups and call centers.
Why can the blue-core antivirus card prevent unknown viruses?
This is a question of many people. For example, recovery products and anti-virus cards build a fence for the data to be protected, and the door of the fence is equivalent to read and write control. Technically speaking, the operating system has multi-level read-write control, which means there are multiple doors. Because the previous products can't physically take over disk reading and writing, they all block a virus at the first few doors, and we are at the last door, which is also the most fundamental door. Therefore, we can block viruses, and some viruses may not be blocked by others.
Anti-virus card is not anti-virus software, the principle is different. There is no need to identify the virus, because we are a door, even if it is vandalized, we are blocked from the wall.
The virus of the future is just a kind of software, and we are the last door, so no matter how the virus technology is improved, we have to go through this last door to destroy the data. And this door is controlled by us, so unknown viruses can't be destroyed as long as they are software.
Blue-core antivirus card is different from ordinary reduction technology.
Blue-core antivirus card integrates restoration technology, and many restoration software and cards also adopt restoration methods. What is the difference?
Make an analysis from the principle:
Ordinary restore card does not directly physically take over hard disk reading and writing;
Such as: Zengba Card, Guanghailan Card, Little Sentinel Card, Sanming Card, etc. The product form is an expansion card, but
Schematic diagram of ordinary reduction card
It is not directly related to the hard disk. As shown in the figure:
Ordinary reduction card is installed in the slot of the motherboard, and there is a ROM chip on the card. According to the PCI specification, when the computer starts, it will first control the contents of the ROM chip, and then it will take over the INT 13 interrupt of the BIOS and save the information such as FAT, boot area, CMOS information and interrupt vector table. To the temporary storage unit in the card or the hidden sector of the hard disk, replace the original interrupt vector table with your own interrupt vector table. In addition, the FAT information is stored in the temporary storage unit to cope with the modification of data in the hard disk; Finally, find some continuous empty disk space in the hard disk, and then save our modified data. In this way, as long as we read and write to the hard disk through the protection program of the restore card, whenever we write data to the hard disk, we actually complete the operation of writing to the hard disk, but we don't really modify the FAT in the hard disk. Instead, I wrote the backup FAT table, which is why all the writing operations are gone after the system restarts.