There is a great deal of debate about this history and evolution of computer viruses. Although many experts may disagree on the origins of viruses, their history is an interesting one. Computer viruses have evolved over the years as the measures taken to detect and disable viruses have become more effective. There is a constant struggle between programmers who write viruses and the programmers who create anti-virus software, with one group trying to stay a step ahead of the other. Computer users can more effectively defend themselves against viruses when they have an understanding of how viruses work and their origins.

In 1949, a mathematician named John Von Neumann introduced the concept of programs that could be taught to replicate themselves. Although this thinking was way ahead of its time, the roots of computer viruses can be traced to the principles Von Neumann was describing. Nearly 20 years later, in the late 1960s, computer users created a game called “Core Wars,” where they would attempt to occupy all of the existing memory on other player’s computers. Programmers at the time had no idea that they were writing computer viruses.

The first known personal computer virus was called the brain virus, and it began infecting PCs in 1986. The Brain Virus was created in Pakistan and was a boot sector virus that affected disk space as opposed to hard drives. The virus would render floppy disks unusable by eliminating their available space. The Brain Virus was a “Stealth” virus, or in other words a virus that tried to affect machines without being noticed by the user. The first anti-virus program was created in 1988. The program was designed specifically to deal with the Brain Virus, detecting, removing, and protecting disks from future problems with the virus. The first Trojan horse virus was also created in the mid 1980’s.

In late 1987, the first “memory resident file infector” was createdóa virus that was embedded in a file and attacked only once the program was ordered to execute by the user. The first of these viruses was called the Lehigh Virus, as the first computers it attacked were at Lehigh University. A month later, a similar virus, called the Jerusalem Virus, attacked in Israel, becoming the first virus that replicated itself within infected files.

In 1990, several companies started selling anti-virus software, including IBM and McAfee, with Symantec introducing Norton Anti-Virus software in 1991. Viruses were become more stealth and more effective than ever before and the need for anti-virus software was growing for PC owners. Ironically, only a few years later, most computer experts felt that anti-virus software would no longer be necessary once Microsoft released its 1995 version of Windows, a fact that is hard to believe in retrospect.

Nearly every year since the mid 90’s, another new virus has been created, detected, and rendered ineffective by anti-virus software. The tug of war between programmers who write viruses and anti-virus software programmers will likely continue for years to come.

One of the most frustrating experiences that a computer owner can go through is to see files lost or damaged by a computer virus. Hackers are continuously creating new virus threats and it’s important to protect your files and computer hardware by having virus protection in place. Many of the newer viruses are designed specifically to circumvent to virus protection that currently exists in the marketplace. Although no anti-virus software can guarantee to keep 100% of viruses from affecting your system, there are two very important things that computer users can do to make being affected by a computer virus less likely.

First, computer users should have reliable anti-virus software and update that software whenever updates are available. There are several anti-virus software options available for all types of computer users and in all price ranges. A free anti-virus program that you download usually won’t provide the same level of protection as an anti-virus software package purchased specifically for your computer, but it will still be better than nothing. The typical activities that you participate in online should also have a bearing on what type of anti-virus software you use. For instance, a user who downloads music, movies, or games is at greater risk of being exposed to a computer virus than one who uses the Internet strictly for E-mail, but neither user is 100% safe.

Along with using effective anti-virus software, it’s important to update your computer with security patches and other updates as they become available. As new viruses and hacker techniques become more common, providers of anti-virus software work to stay ahead of the curve in preventing damaging virus attacks. Most computer viruses are fairly slow moving and makers of anti-virus software are generally able to get remedies out to their users fairly quickly, but it’s up to the users to install and use these software updates.

The other important way to protect yourself from computer viruses is to practice safe habits when using the computer. There are several sites that allow users to download music for instance, but some are much more reliable than others. Sites that charge more for music downloads also provide a much higher level of security than sites that provide cheap or even free downloads. If your Internet activities open you to more risk of accidentally downloading a virus, it’s a good idea to spend a little extra money for better protection. In addition, never download anything that comes from an unknown source or click on links embedded in e-mails when you don’t know the sender. Part of protecting yourself from viruses is being smart enough to avoid situations where a virus could endanger your system.

Computer viruses come in all shapes and sizes and can do various extents of damage, from damaging files to physically damaging hard drives and other equipment. Virus protection can be costly, but not nearly as costly as the process of trying to recover lost or damaged files. Staying up to date with anti-virus software and practicing smart computer habits can keep most users out of trouble.

There are several types of computer viruses that Internet users need to be aware of. These viruses can be contracted and infect a computer in a variety of ways, ranging from mild annoyances to destructive forces to computer files and hardware. Viruses can enter your computer in a number of ways, but are generally avoidable with a combination of effective anti-virus software and safe surfing habits when online. However, it’s good to know of what types of viruses and other threats could impact your computer.

Viruses

A virus is a computer program that is written to enter your computer, overwrite existing program data, and replicate itself without the knowledge of the owner of the computer. There are several varieties of viruses, including boot sector viruses, companion viruses, link viruses, and macro viruses. Viruses can enter a computer in various ways but they all have one thing in common: they must be executed by the computer user to affect a computer. The amount of damage done by a virus varies greatly, some viruses are never even detected while others erase program data, destroy information on hard drives and disks, and are a hassle to detect and remove.

Worms

A worm is similar to a virus, but it spreads from computer to computer over a network connection. A worm is not likely to afflict a single computer, but is a common and troublesome problem in some computer networks. Worms are designed to enter computers and then scan systems for security flaws and look for areas that are unprotected. A classic example is the ILOVEYOU worm, an E-mail that had a subject of “I love you” and an attachment inside. When the attachment was opened, the worm entered the computer and destroyed several different types of files. The worm also sent itself to the user’s entire Outlook address book, afflicting computers all along the way. In 2004, an estimated 45 million computer were hit with the ILOVEYOU worm in just one day.

Trojan Horses

A Trojan horse is a program that is downloaded by a computer user that does not destroy data or files. Instead, a Trojan horse allows files to be accessed by outside parties. The problem begins with a download of a file that seems innocent – perhaps a song or small program file. Trojan horses are a serious concern because of the rising seriousness of identity theft and the importance of protecting the privacy of sensitive information. The key to avoiding a Trojan horse is to download only content that you are 100% certain is from a credible and safe source.

The best way to avoid viruses, worms, and Trojan horses is to make sure anti-virus software is reliable and up to date. Many computer owners take the first step of purchasing good anti-virus software, but they fail to install patches and updates as they become available. Because the creators are viruses are getting more and more creative, it’s essential to keep security measures up to date on your computer.

In today’s world, internet security is almost an afterthought. Most new computers and many Internet Service Providers include anti-virus software and other security measures for all of their users. The world of Internet security continues to evolve however, with hackers devising ingenious new ways to break into systems that previously had been impenetrable. Internet security is in place to ensure that information is kept safe and protected from those who might try to access it without permission or intend to destroy it. To understand why security measures are so important, we must understand the history of the Internet and of internet security.

Today, over 1 billion people have Internet access worldwide. North America accounts for only 18% of worldwide Internet usage. But the Internet started off very small. Originally, the Internet was called the ARPANET, and was developed during the late 1960’s with a goal of having a functioning network regardless of attacks or failures to part of the network.  The ARPANET, first put in place for the U.S. Department of Defense, was designed to reroute information and traffic if there were problems in a different part of the system, so if a part of the system was attacked, the Internet would not shut down entirely.

Soon, the Internet began growing more and more quickly. Universities and other agencies became connected, as information flowed more freely than ever before. Originally, everyone on the Internet had access to all of the posted information and there was no security in place. Without understanding how big the Internet would become, there was no concern about protecting information.

The first widely known security breach occurred in 1986, when users internationally tried to access and copy information on the Internet through US government computers. Two years later, a programmer wrote code that created the first widely known “worm”, this called the Morris worm. Robert Morris, a student at Cornell University, created the worm, which entered a new user computer, began replicating itself inside that computer, and continued through the network. The worm was programmed to use as much of the processing power of the invaded computer as possible, rendering the computer useless. The worm caused 10% of the computers connected to the Internet in 1988 to crash and the need for internet security was born.

By 1989, the ARPANET was known as the Internet and connected over 100,000 computers worldwide. Hackers worked tirelessly to access privileged information. The amount of information on the Internet has grown rapidly over the past 30 years, and as more people have access to the Internet, there is more incentive for hackers than ever before. Personal information is valuable, and programs have been created to decipher encryptions, processes are in place to figure out usernames and passwords, and the Internet has become not only an amazing tool, but a tremendous liability when information is not protected.

As new methods are developed to access and tamper with information on the Internet, internet security is becoming more effective at thwarting attacks and attempts at access, a battle that is likely to rage on for years to come.