Do you know what keyloggers is? A keylogger is mainly a program which runs in computer silently and secretly recording all the keystrokes of the user. They used a method of recording and capturing user's keystrokes including passwords. Once after the key strokes are logged for the latter retrieval by the attacker they are hidden away. Keyloggers are basically of two types, it can be software or hardware based.
Hardware based keyloggers are generally more complex that software keyloggers and is much hard to detect. In today's world keyloggers are the most powerful applications used for gathering information commonly by encrypted traffic.
There are some features common in all hardware keyloggers, as they all must have.
A non-volatile memory device - Non volatile memory such as flash memory uses to store all the recorded information and retains them even when power is lost.
A microcontroller - It is the heart of keyloggers which interrupts the data strea, between the computer and keyboard and posses it and then sends to the memory for storing.
How hardware keyloggers works?
Hardware keyloggers are implemented via BIOS level firmware or through a device plug-in between the computer and computer keyboard. They have inbuilt memory which is use to store all the log keyboard activity for later encryption use. Almost in all cases the recorded data is retrieved by typing some kinds of special words or special password into a text editor of the computer which after detecting by the keyloggers send to the computer to produce a menu. Apart from producing menu some of the keyloggers provide high speed download which stimulate the retrieval process of stored data.
Hardware keyloggers provides huge storage capacity typical the memory capacity of range of few kilobytes to hundreds gigabytes in which each keystroke record consume just a byte of memory space.
Regular keylogger - Here keystrokes in logged in by means of a hardware device attached between computer and keyboard and it is not dependent upon operating system of computer thus does not interfere any program running on the target machine.
Firmware - It is a computer BIOS responsible for handling keystrokes and can be reprogrammed in order to record keystrokes and to posses them.
Wireless sniffers - It collects the packet of data transferring from wireless keyboard to computer or receiver and then crack the encryption key in order to make the wireless communication secure
Hardware keylogger supports all sorts of operating system and thus you can use it in any computer at any time. If you are looking for a simple and fruitful keyloggers then this will be the best choice for you.