Keylogger

The term is made up of the English “key”, here for “key” and “logger” for “record, log”. Keyloggers are hardware or software that log inputs from a keyboard. This allows cybercriminals to identify passwords and PIN numbers, for example, and then misuse them. Keyloggers are classified as malicious programs (malware) and are assigned to the subcategory Spyware .

What does the term keylogger mean in detail?

There are technically different keyloggers:

• As hardware, they can be plugged between the keyboard and the computer, for example.
• As software, it can be installed on the computer itself or on other devices in the network.
• They can store inputs and be read out later, or they can transmit the read data via the Internet.
• Keyloggers can be infiltrated into company-owned computers
• Keyloggers can also be located in or on other people’s devices that you use when traveling (hotel lobby, internet café, free Wi-Fi hotspot, etc.)

Keyloggers are also available for purchase for businesses and private consumers. According to German law (Criminal Code § 202a, spying on data), keyloggers may only be used with the knowledge of the user(s). For example, in companies, the works council must agree to the use of keyloggers.

Where do I encounter keyloggers in my everyday work?

You may encounter it whenever you use your keyboard to type – even on business trips.

What can I do to protect myself from keyloggers?

In your company

• Many measures to increase cybersecurity also have a preventive effect against keyloggers In addition, the following are recommended:
• Visual inspection of plugged-in hardware for hardware keyloggers
• Targeted use of the latest virus and anti-spyware programs to detect and remove any keyloggers

On the road

• In general, the following applies: If possible, do not enter confidential data on other computers!
• Only after consultation with your IT manager – possible protection against hardware keyloggers: a virtual keyboard (can be activated in the common operating systems with just a few mouse clicks)
• Only after consulting your IT manager – possible protection against software keyloggers: “Contaminate” your passwords. To do this, click the mouse outside the input field while entering the password and type in a few random letters. Click again in the input field and continue entering your password.

Interesting background information

Information from the Lower Saxony police on the topic of “Phishing via keylogger” (topic still to be selected in the overview)

The Wikipedia article on the subject of keyloggerswith illustrations of exemplary hardware keyloggers.