Segurança dos computadores

Abstract

Currently, information systems represent, for most companies, a true "backbone" to support the entire activity. The efficiency and reliability of Information Systems represent today a vital condition for the success of modern and competitive companies. During the last decade, the use of information technologies has increased extraordinarily, not only due to the growth in the total number of users, but also due to the great variety and sophistication of the developed applications. As a result, companies are becoming increasingly vulnerable, causing eventual disasters to expose the company to the risk of losing control of its users' information. This transformation is brought about using communication and information technologies that allow us to place, within the reach of our individual and collective knowledge, the various information about the events at the time they take place, accompanied by analysis and comments interpreting their sense. This produces an acceleration effect in the process of acquiring and transmitting knowledge, which makes people more demanding, informed and educated. However, more information presupposes a vast and complex support network, the creation of new information applications and a countless number of users, with different levels of access to data. This phenomenon, characteristic of the Information Age, implies risks that have to be prevented and addressed. It is on this subject that I will seek to reflect in this work, where a survey is made of the main causes that make such technologies dangerous for society when the assumptions in terms of security are not properly equated and analyzed the possible risks, talking about the Safety of Computers means taking into account all these factors. In a more specific approach, talking about Mozambique is talking about a country that, like many others, is still flourishing in computerized information processing and transmission technologies, therefore vulnerable to violation of transmitted information, given the problems that are already known, such as weak domain of these technologies, weak financial resources, among others. The present work intends to awaken and address these issues, drawing attention to the main risks and how to deprive or avoid them. I'm sure I've only addressed part of the problem, in a student strand, but I believe that other colleagues will do so in the future. In terms of scrutiny of the work, I focused on the following aspects in general: basic computer security and the main risks, cryptographic methods as a security tool in the transmission of information, security architectures and, finally, the use of encryption as another means of security , more specifically codes with an irrational basis.