Key logger

Keystroke logging, often referred to as keylogging or keyboard capturing, is the action of recording (logging) the keys struck on a keyboard, typically covertly, so that the person using the keyboard is unaware that their actions are being monitored. Keylogging can also be used to study human–computer interaction. Numerous keylogging methods exist: they range from hardware and software-based approaches to acoustic analysis.

These are computer programs designed to work on the target computer's software. Keyloggers are used in IT organizations to troubleshoot technical problems with computers and business networks. Families and business people use keyloggers legally to monitor network usage without their users' direct knowledge. Even Microsoft publicly admitted that Windows 10 operation system has a built-in keylogger in its final version “to improve typing and writing services”. However, malicious individuals can use keyloggers on public computers to steal passwords or credit card information. Most keyloggers are not stopped by HTTPS encryption because that only protects data in transit between computers, thus the threat being from the user's computer.

From a technical perspective there are several categories:

Keystroke logging is now an established research method for the study of writing processes. Different programs have been developed to collect online process data of writing activities, including Inputlog, Scriptlog, and Translog.

Keystroke logging is legitimately used as a suitable research instrument in a number of writing contexts. These include studies on cognitive writing processes, which include

Keystroke logging can be used to research writing, specifically. It can also be integrated in educational domains for second language learning, programming skills, and typing skills.

Software keyloggers may be augmented with features that capture user information without relying on keyboard key presses as the sole input. Some of these features include:

Hardware-based keyloggers do not depend upon any software being installed as they exist at a hardware level in a computer system.

An early keylogger was written by Perry Kivolowitz and posted to the Usenet news group net.unix-wizards,net.sources on November 17, 1983. The posting seems to be a motivating factor in restricting access to /dev/kmem on Unix systems. The user-mode program operated by locating and dumping character lists (clists) as they were assembled in the Unix kernel.

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