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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. Computer virus - Wikipedia

   en.wikipedia.org/wiki/Computer_virus

   Computer virus. Hex dump of the Brain virus, generally regarded as the first computer virus for the IBM Personal Computer (IBM PC) and compatibles. A computer virus [1] is a type of malware that, when executed, replicates itself by modifying other computer programs and inserting its own code into those programs.

4. 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 ...

5. 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 ...

6. Internet security - Wikipedia

   en.wikipedia.org/wiki/Internet_security

   Malicious software. Malicious software comes in many forms, such as viruses, Trojan horses, spyware, and worms. Malware, a portmanteau of malicious software, is any software used to disrupt computer operation, gather sensitive information, or gain access to private computer systems. Malware is defined by its malicious intent, acting against the ...

7. 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 ...