Anti virus

Computer Science

1. ANTI VIRUS Presented To: PIR AMAD ALI SHAH

2. PRESENTED BY FURQAN UMER KHAN B-18261 M. SOHAIB AFZAAL B-17545

3. Content INTRODUCTION HISTORY ANTIVIRUS TYPES ANTIVIRUS SOFTWARE ANTIVIRUS SOFTWARE TYPES ANTIVIRUS PROGRAM

4. What is Anti-Virus Antivirus or anti-virus software (often abbreviated as AV ), sometimes known as anti-malware software, is computer software used to prevent, detect and remove malicious software . Antivirus software was originally developed to detect and remove computer viruses . In particular, modern antivirus software can protect from: malicious browser helper objects (BHOs), browser hijackers , ransomware , keyloggers , backdoors , rootkits , trojan horses , worms , malicious LSPs , dialers , fraudtools , adware and spyware . Some products also include protection from other computer threats , such as infected and malicious URLs , spam , scam and phishing attacks, online identity (privacy), online banking attacks, social engineering techniques, advanced persistent threat (APT) and botnet DDoS attacks

5. History In the early 1980s, Internet security was practically nonexistent. No large-scale attacks had ever been attempted, and network-based vulnerabilities were rarely, if ever, exploited. T his changed in the late 1980s with the Morris Worm , the first known large-scale attack propagated via the Internet. Today, spyware, viruses, trojan attacks, worms, and malware are all common occurrences affecting nearly every computer user at least once.

6. Anti-Virus Types Firewall software : Analyzes incoming and outgoing data packets on a network; that is, all the information sent and received through the computer's network connection. Network layer firewalls : are called packet filters. These firewalls are the simplest of firewalls, and only allow information packets to pass through the firewall if the packet matches a specific set of rules. Proxy servers : act as a firewall in that they inspect incoming packets for specific applications and block all other requests. Application Layer Firewalls : These firewalls inspect all packets for specific protocols, such as FTP and browser traffic.

7. Antivirus Software Antivirus software identifies, prevents, and removes malware from a computer system. Malware is any number of viruses and software bits that intend to harm the computer or steal information, such as viruses, adware, rootkits , backdoors, hijackers, keyloggers , spyware, trojans , and worms. Modern antivirus software employs several methods to detect and remove malware. However, no antivirus software can detect and prevent all possible malware.

8. Types of Antivirus Software Signature Based Detection: The antivirus software can then scan each file on the computer's hardware and memory and compare the entire file, as well as small sections of each file, against the virus signature database. Heuristics: To help protect computers against new and unknown malware, heuristic detection algorithms were created. Rootkit Detection: Rootkits are a particularly nasty form of malware. Real Time Protection: Most antivirus software provides real-time protection, often under any number of clever synonyms such as resident shield, background guard, autoprotect , and so on.

9. Antispyware: software often provides real-time protection, just like most antivirus software does. Additionally, just like most antivirus software, antispyware software relies on up to date spyware signature definition files to work properly.

10. Antivirus Program

11. Conclusion Antivirus and security software has become an essential part of modern computer use. Firewalls inspect the data flowing between the computer and the Internet and attempt to filter out information packets that seek to exploit vulnerabilities. Antivirus software has become quite sophisticated, often involving signature-based detection methods, heuristic detection methods, rootkit detection, and real-time scanning to prevent computers from being infected with malware. Antispyware software specifically protects the computer from spyware, which can slow down the computer's performance.