How Antivirus Software Works In Computer and Laptop!
Today almost every computer comes with a pre-installed antivirus software on our computers. Now days antivirus has become one of the most powerful and necessary software for every computer. Even though every one of us have an antivirus software installed on our computers, An antivirus software typically uses a variety of strategies in detecting and removing viruses, worms and other malware programs. Today I tell you how antivirus software works in our computers and laptops.
How Antivirus Works: The following are the two most widely working identification methods in Antivirus:
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Signature based detection: Signature based detection is the most common method that antivirus uses to identify malware. This method is somewhat limited by the fact that it can only identify a limited amount of emerging threats, e.g. generic, or extremely broad, signatures.When antivirus software scans a file for viruses, it checks the contents of a file against a dictionary of virus signatures. A virus signature is the viral code. Finding a virus signature in a file is the same as saying you found the virus itself. If a virus signature is found in a file, the antivirus software can take action to remove the virus. Antivirus software will usually perform one or more of the following actions; quarantining, repairing, or deleting.
Heuristic-based detection – This type of detection is most commonly used in combination with signature-based detection. Heuristic technology is deployed in most of the antivirus programs. This helps the antivirus software to detect new or a variant or an altered version of malware, even in the absence of the latest virus definitions.
Antivirus programs use heuristics, by running susceptible programs or applications with suspicious code on it, within a runtime virtual environment. This keeps the vulnerable code from infecting the real world environment.
Behavioural-based detection – This type of detection is used in Intrusion Detection mechanism. This concentrates more in detecting the characteristics of the malware during execution. This mechanism detects malware only while the malware performs malware actions.