1. Keyboard Collector
It is often times necessary to monitor each
keystroke a user types on your computer. This
can be accomplished in several ways. The first
is to insert a small hardware device behind the
back of the computer between the keyboard
connector and computer keyboard port.
Because of it’s size and resemblance to an
ordinary keyboard plug and location of
installation a keylogger is mostly undetectable.
One can later physically remove the device to
access the information it has gathered. Let’s
say you have a child that uses the Internet. It
would be easy to periodically check that they
are using it appropriately

2. Children need to know that the Internet is a very
public place and once you write it, there is a
record. Keystrokes are saved as text. Another
example would be an employer that needs to
know what’s going on when they aren’t present.
Worst case scenario is an attacker that sneaks
one in and out and now has access to your bank
accounts, credit card numbers, etc..
The second kind of keylogger, software
keyloggers, are programs that are downloaded.
Often times a software keylogger is unknowingly
downloaded and installed as a Trojan or by a
virus. As shown below a software keylogger
silently records all keystrokes, including
passwords and sensitive information like a
hardware keylogger.

3. This information can be secretly transmitted
to a remote location, it is not necessary to
physical access a user’s computer.
Keyloggers also hide themselves so that a
user cannot easily detect them, Windows
task manager won't show a keylogger
running.
From a practical sense, having a keylogger in
place, troubleshooting a failure on a
computer might be easier if you have
detailed information on what the user did
immediately prior to the situation.