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2. Malware - Wikipedia

   en.wikipedia.org/wiki/Malware

   Malware (a portmanteau for malicious software) is any software intentionally designed to cause disruption to a computer, server, client, or computer network, leak private information, gain unauthorized access to information or systems, deprive access to information, or which unknowingly interferes with the user's computer security and privacy.

3. Trojan horse (computing) - Wikipedia

   en.wikipedia.org/wiki/Trojan_horse_(computing)

   Linux sudo example. A Trojan horse is a program that purports to perform some legitimate function, yet upon execution it compromises the user's security. A simple example is the following malicious version of the Linux sudo command. An attacker would place this script in a publicly writable directory (e.g., /tmp).

4. Computer virus - Wikipedia

   en.wikipedia.org/wiki/Computer_virus

   Fred Cohen's theoretical compression virus was an example of a virus which was not malicious software , but was putatively benevolent (well-intentioned). However, antivirus professionals do not accept the concept of "benevolent viruses", as any desired function can be implemented without involving a virus (automatic compression, for instance ...

5. Ransomware - Wikipedia

   en.wikipedia.org/wiki/Ransomware

   Ransomware is a type of cryptovirological malware that permanently blocks access to the victim's personal data unless a ransom is paid. While some simple ransomware may lock the system without damaging any files, more advanced malware uses a technique called cryptoviral extortion. It encrypts the victim's files, making them inaccessible, and ...

6. Computer security - Wikipedia

   en.wikipedia.org/wiki/Computer_security

   An example of a physical security measure: a metal lock on the back of a personal computer to prevent hardware tampering. Computer security, cybersecurity, digital security, or information technology security (IT security) is the protection of computer systems and networks from attacks by malicious actors that may result in unauthorized information disclosure, theft of, or damage to hardware ...

7. Antivirus software - Wikipedia

   en.wikipedia.org/wiki/Antivirus_software

   ClamTk, an open-source antivirus based on the ClamAV antivirus engine, was originally developed by Tomasz Kojm in 2001. Antivirus software (abbreviated to AV software ), also known as anti-malware, is a computer program used to prevent, detect, and remove malware . Antivirus software was originally developed to detect and remove computer ...