Virus Informatic - Christian Pelayo

 "Virus informatic.
Christian Orlando Pelayo Naranjo"

Computer viruses are as old as personal computers. Since the early eighties, these threats began to invade computer equipment, spread and created problems to become real headaches for users. At first, they simply sent messages on screen and consumed system resources; however, the degree of sophistication and the harm it can generate today has drawn the attention of specialized companies that devote much of their efforts to detect, control and eliminate this malware.

What is a virus informatic ?

In its simplest definition, a computer virus is a program that has the characteristic of creating copies of itself, but always depending on a file to be able to exert its viral action; (in 1959 the mathematician Leonel S. Penrose published the article "Self Reproducing machines", which describes programs capable of activating, self-reproducing and making changes of themselves), it was not until 1983 when The term "virus" is proposed by Engineer Fred Cohen. Its propagation strategy is similar to that of a biological virus; that is, the viral code requires inserting itself on the contents of a file that has also been activated code, and yet it is a virus-free virus in a data file, when it is Opened by an editor or application software can execute a sequence of implicit instructions in which to activate its viral action.

It should be noted that for some years the creation of viruses was decreasing, which resulted in worms, programs that create copies of themselves (that's why they are also often called viruses), but without files dependent to be able to run, What makes it more complex and dangerous.

They are generally propagated through the network (Internet worms), email (email worms) or both (multivector worms), generating harmful effects on clients, servers or bandwidth.

There is an endless list of problems that viruses are capable of causing, for example, deteriorating, destroying or deleting data files or even databases, deleting and modifying executable files, blocking the operating system layout, saturating main memory with data Insertable, hard disk space, alter the operation of the application software, creating useless traffic on the network, stealing confidential information, on control and hardware from damaging.

The main suspicions of the existence of a virus in our computers are due to the generally sudden and exaggerated slowness in the execution of application programs or to start the load of the operating system (blocking the equipment), constant blocking of the equipment, problems to access the (Hard drives, flash memory), abnormally erratic printing or inability to print documents, identification of filenames with special characters (sequences of numbers or signs: $, &, /, *,!) Very long, location of Files with unreasonably large sizes or unusual message display.

Electronic reference.

http://www.iingen.unam.mx/es-mx/Publicaciones/GacetaElectronica/Febrero2015/Paginas/Virusinformaticos.aspx