58
1 Information Weapon: Concepts, Means, Methods …
Fig. 1.30 Connecting a keylogger in the form of an adapter to the USB interface of the keyboard
Fig. 1.31 Reconnecting a keylogger in the form of an adapter from the PS/2 keyboard interface to
the USB interface (a); connecting a keylogger in the form of a keyboard extension cord to the USB
interface of the system unit (b)
Hardware Trojans for intercepting information sent to the printer are installed
in the printer body and their operation principle is the same as that of the
abovementioned hardware Trojans.
Hardware Trojans for intercepting information recorded on the hard drive of the
PC are the most complex of all. They consist of an interception unit, a processing
unit, a transmitting unit, a control unit, and a power supply unit (AC/DC converter).
They are secretly installed in the system unit and are connected through a special
interception unit to the interface connecting hard drive to motherboard. Intercepted
signals are sent to a special processing unit, including a specialized processor, where
they are processed according to a special program. Files with the specified extension
(for example, *.doc) are recorded in the RAM or flash memory. By command, the
recorded and stored information in digital form is transmitted via a radio channel or
a 220 V network to the point of reception, where it is recorded as separate files on a
hard drive for further processing.
1 Information Weapon: Concepts, Means, Methods …
Fig. 1.30 Connecting a keylogger in the form of an adapter to the USB interface of the keyboard
Fig. 1.31 Reconnecting a keylogger in the form of an adapter from the PS/2 keyboard interface to
the USB interface (a); connecting a keylogger in the form of a keyboard extension cord to the USB
interface of the system unit (b)
Hardware Trojans for intercepting information sent to the printer are installed
in the printer body and their operation principle is the same as that of the
abovementioned hardware Trojans.
Hardware Trojans for intercepting information recorded on the hard drive of the
PC are the most complex of all. They consist of an interception unit, a processing
unit, a transmitting unit, a control unit, and a power supply unit (AC/DC converter).
They are secretly installed in the system unit and are connected through a special
interception unit to the interface connecting hard drive to motherboard. Intercepted
signals are sent to a special processing unit, including a specialized processor, where
they are processed according to a special program. Files with the specified extension
(for example, *.doc) are recorded in the RAM or flash memory. By command, the
recorded and stored information in digital form is transmitted via a radio channel or
a 220 V network to the point of reception, where it is recorded as separate files on a
hard drive for further processing.