Spyware is software that aims to gather information about a person or organization without their knowledge, that may send such information to another entity without the consumer’s consent, or that asserts control over a device without the consumer’s knowledge. Spyware is mostly used for the purposes of tracking and storing Internet users’ movements on the Web and serving up pop-up ads to Internet users. Whenever spyware is used for malicious purposes, its presence is typically hidden from the user and can be difficult to detect. Some spyware, such as keyloggers, may be installed by the owner of a shared, corporate, or public computer intentionally in order to monitor users.
Keystroke logging, often referred to as keylogging or keyboard capturing, is the action of recording (logging) the keys struck on a keyboard, typically covertly(লুকিয়ে লুকিয়ে), so that the person using the keyboard is unaware that their actions are being monitored. Data can then be retrieved by the person operating the logging program. A keylogger can be either software or hardware.
While the programs themselves are legal, with many of them being designed to allow employers to oversee the use of their computers, keyloggers are most often used for the purpose of stealing passwords and other confidential information.