Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you what are the main characteristics and significance of computer viruses. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

The main characteristics and significance of computer viruses are as follows: 1, concealment, destructiveness, infectivity, parasitism, executability, initiative of attack and other characteristics; 2, it will directly destroy important information and data of the computer, consume memory and disk space, and so on.

The main characteristics and significance of computer viruses:

First, characteristics:

1. Concealment

Computer viruses are not easy to be found, because computer viruses have strong concealment, and they often exist in the form of hidden files or program codes. In ordinary virus detection and killing, it is difficult to achieve timely and effective detection and killing. The virus is disguised as a normal program, and computer virus scanning is difficult to detect. Moreover, some viruses are designed as virus repair programs to induce users to use them, so as to implant the virus and invade the computer. Therefore, the concealment of computer viruses makes computer security prevention in a passive state, resulting in serious security risks.

2. Destructive

When the virus invades the computer, it is often extremely destructive, which can destroy the data and information, even cause a large area of computer paralysis, and cause great losses to computer users. Such as common Trojans, worms and other computer viruses, can invade the computer on a large scale, bringing security risks to the computer.

3. Infectivity

One of the major characteristics of computer viruses is contagious, which can invade the computer through U disk, network and other ways. After the invasion, it is often possible to spread the virus, infect the uninfected computer, and then cause a large area of paralysis and other accidents. With the continuous development of network information technology, the virus can achieve a wide range of malicious intrusion in a short period of time. Therefore, in the security defense of computer viruses, how to face the rapid virus infection has become an important basis for effective defense against viruses, and it is also the key to build a defense system.

4. Parasitism

Computer viruses also have parasitic characteristics. Computer viruses need to be parasitic in the host in order to survive, to better exert their functions and destroy the normal function of the host. In general, computer viruses are parasitic in other normal programs or data, and on this basis, a certain medium is used to achieve transmission. In the actual operation of the host computer, once a certain setting condition is reached, the computer virus will be activated. With the start of the program, the computer virus will constantly assist and modify the host computer files, so that its destructive role can be brought into full play.

5. Enforceability

Like other legitimate programs, a computer virus is an executable program, but it is not a complete program, but parasitic on other executable programs, so it enjoys all the rights that programs can get.

6. Triggering

The characteristic of a virus that induces a virus to infect or attack because of an event or value.

7. Initiative of attack

The virus attack on the system is active, no matter how strict the protection measures taken by the computer system, it is impossible to completely rule out the virus attack on the system, and the protection measures are at best a means of prevention.

8. The pertinence of the virus

Computer viruses are specific to specific computers and specific operating systems. For example, there are some for IBM PC and its compatible computers, some for Apple's Macintosh, and some for UNIX operating system. For example, the Globular virus is targeted at the DOS operating system on IBM PCs and their compatible computers.

Second, significance:

(1) if the virus is activated, the computer will have a great reaction; most viruses will directly destroy the important information and data of the computer when they are activated, it will directly destroy the CMOS settings or delete important files, format the disk or rewrite the directory area, and rewrite the files with "junk" data. A computer virus is a piece of computer code, which must occupy the memory space of the computer, and some large viruses still copy themselves inside the computer, resulting in a substantial reduction in computer memory. when the virus is running, it also preempts the interrupt, modifies the interrupt address and adds the virus's "private goods" in the interrupt process, which interferes with the normal operation of the system. After the virus invades the system, it will automatically collect users' important data, steal and leak information and data, resulting in a large number of leakage of user information, bringing inestimable losses and serious consequences to users.

(2) consume memory and disk space. For example, if you do not access the disk, but the disk light flashes wildly, or when you are not running many programs, you may find that the system has taken up a lot of memory, which may be caused by the virus; many viruses are resident in memory in the active state, and some file viruses can infect a large number of files in a short time, and each file is lengthened to varying degrees, resulting in a serious waste of disk space. Normal software often needs to be tested by many people for many times to improve, and computer viruses are usually sent out quickly after individual people finish on a computer, so the harm that the virus brings to the computer is not only the virus expected by the manufacturer, but also caused by some computer virus errors.

(3) computer viruses cause serious psychological pressure on users. The proliferation of viruses makes users nervous and always worried about being infected by the virus. Because most people do not know much about the virus, once there are phenomena such as computer crashes and abnormal software operation, people often suspect that these phenomena may be caused by computer viruses. According to statistics, it is a common phenomenon for computer users to suspect that "the computer has a virus". More than 70% of the computer users are worried that their computers have invaded the virus, but in fact, all the phenomena that occur in the computer are not caused by the virus.

These are the main features and significance of the computer virus shared by the editor. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.