Desenvolvimento dum sistema criptográfico baseado no algoritmo IDEA e nos códigos de Fibonacci IDEA-F

Abstract

Ever since his emergence, around 4 million years ago, Man has had needs. In order to satisfy them he was forced to reason and seek solutions, which made him evolve. Thus, it can be said that the evolution of Man has always been linked to his needs [13]. With the development of societies, characterized by a population growth, man concluded that to meet their individual and collective needs should cooperate with his fellow man, which culminated with the emergence of organizations, which are dedicated to one or more economic activities, some dedicated to the manufacture of goods, others to the marketing of those same goods, others with political objectives, others with the aim of providing services of various kinds (health, education, transportation, etc.). One of the main characteristics of any economic activity is that it generates, or rather, works with data, which made one of the first challenges of the Organisations to define appropriate mechanisms for the processing, capture and storage of these data. It is through data that organisations obtain information that is used for decision making, coordination of their activity, control, analysis of their expansion and conflict resolution. Therefore, data processing must be objective, fast and reliable in order to produce useful, timely and reliable information. Initially, data management was confined to manual processes, such as the use of paper for recording and processing data, the use of files and cabinets for storage, this working model was very limited and expensive. For example, the calculation of transactions was carried out by a large team of clerks, which was costly and increased the likelihood of errors, and in certain areas such as science and engineering, larger and larger tables of numbers were required. (TRADUÇAO NOSSA)