Computer viruses are a type of virus hidden on storage media in computer systems.
Computer viruses do not exist naturally. They are a set of instructions programmed by someone to take advantage of the inherent vulnerabilities of computer software and hardware. set or program code. (Recommended learning:PHP video tutorial)
It can lurk in the computer's storage medium (or program) through some means, and is activated when certain conditions are met. By modifying other programs, you put your exact copy or possible evolved form into other programs, thereby infecting other programs and damaging computer resources. The so-called viruses are man-made and are very harmful to other users. big!
Self-Characteristics
Characteristics of computer viruses: Computer viruses are specially-written programs that have self-replication capabilities and are highly infectious. , certain latency, specific triggering and great destructiveness.
inevitability
The inevitability of the existence of viruses: computer information needs to be accessed, copied, and transmitted. Viruses, as a form of information, can reproduce, infect, and destroy accordingly. , and when the virus takes control, they will actively look for infection targets and spread themselves widely.
Long-term
The long-term nature of computer viruses: Viruses often take advantage of the weaknesses of computer operating systems to spread. Improving system security is one of the anti-virus
Internet virus industry chain
Important aspects. A perfect system does not exist. Too much emphasis on improving system security will make the system spend most of its time checking for viruses, and the system loses usability, practicality and ease of use. On the other hand, the requirement for information confidentiality makes people prone to leaking secrets and There is no choice between catching the virus. Viruses and anti-virus will exist as a technical confrontation for a long time, and both technologies will develop in the long term with the development of computer technology.
The generation of computer viruses:
Viruses do not come from sudden or accidental sources. A sudden power outage and accidental errors will produce some disordered and chaotic codes in the computer's disk and memory. A virus is a relatively perfect, sophisticated and rigorous code, organized in a strict order, and related to the system where it is located. When the network environment is adapted and coordinated, the virus will not be formed by accident, and it needs to have a certain length. This basic length is impossible to generate through random code in terms of probability.
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