METHOD FOR PREVENTING UNAUTHORISED ACCESS TO INFORMATION STORED IN PERSONAL COMPUTER Russian patent published in 2013 - IPC G06F12/14 G06F21/30 

FIELD: information technology.

SUBSTANCE: before booting a resident operating system (ROS), execution of a series of instructions is set, which, according to the address in random access memory (RAM) of the personal computer of the boot code of the primary operating system, through which it is booted from a real boot device (FDD, HDD, CDROM, USB, Network), establishes the break point such that its triggering will be handled by the corresponding code in the BIOS extension, wherein the minimum boot code of the primary operating system and information on the real boot device are stored in the RAM of the personal computer. Returning management of the computer BIOS is carried out only after performing this preparatory operation. Further, upon triggering of the break point, the first instruction of the boot code to switch to the ROS boot device is changed, the ROS is booted from memory of the information security equipment, and the security task is launched (checking integrity, identification/authentication etc), at the end of which a program to enter into normal mode of operation of the personal computer is executed.

EFFECT: broader functional capabilities of a personal computer through information security equipment having non-volatile memory circuits and its own BIOS extension circuit.

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