Methods Used By Anti Virus Software

Most computer-users have anti virus software on their hard drives but they benefit from this protection without really understanding it. Actually, anti-virus protection has become so much better since its earliest days that many people are almost unaware of it. It comes with most computers as an item already installed on the hard drive or the installation is handled during the computer’s first run after it is purchased. At that point, the software updates itself with little need for the user’s interference.

There are a few different ways that anti virus software can operate. One of the most common methods that this software can use to defend a computer from malware is through the signature detection method. A more sophisticated method of virus detection analyzes suspicious code heuristically.

Signature Detection

Most software designed to detect and manage malware utilizes a database of codes which viruses have used in the past. This database is constantly updated by the makers of the anti-virus program as they analyze the millions of viruses roaming the Internet and the frequent appearances of new, malicious codes. Each time that the anti-virus program functions, it scans the hard drive for executable codes that are identical to those that are in its database.

When the program encounters such codes, it can address the problem in one of two ways. Sometimes it can actually heal the problem and turn the malicious code into something useful or benign. In many more cases, it is necessary for the program to capture the malicious code and move it into a specially-created, digital space called the vault. Here the malware is unable to access the rest of the computer or perform any malicious functions.

Heuristic Analysis

The major drawback to the signature detection method is its reliance on already known viruses. While such a database can maintain a high degree of protection due to daily updates, it does not protect a computer against the very newest viruses. This is especially true for large businesses, which may the first targets of attacks.

To protect computers against even unknown threats, the providers of anti-virus protection use software capable of heuristic analysis. This method does not rely on a database of codes. Instead, the software is capable of searching for codes that bear resemblance to known patterns of malware code. This software essentially thinks about the codes that it reviews and decides if something is malicious or not based on this analysis.

Some anti-virus software can even place the suspicious codes in a sandbox to run tests on it. A sandbox is a safe space created on the hard drive where codes can be executed without actually allowing them to perform any functions on the computer. If the malicious intent of the code is revealed here, the anti-virus program can either imprison the code or destroy it.

These methods are used to deal with spyware and adware as well. These are malicious programs that have more sophisticated intentions. Often, they are designed to observe a user’s habits and make him or her the target of advertising. The best anti virus software can manage all sorts of malware.