Criptografia RSA : uma abordagem para o ensino médio

Abstract

The communication by internet demands security in order that information that circulates over the networks does not be in the domain of unauthorized people. The cryptography has the function of protecting this information. Therefore, it is important to comprehend the RSA cryptography, proposing a study in high school. A type of asymmetrical cryptography used in electronic commerce and financial transactions that demand the mathematics, especially the theory of numbers has been studied since elementary school, for its development. Two experiences were performed, one of them with elementary school students approaching some basic contents of theory of numbers, and the other with high school students with the RSA cryptography content. It was perceived interest from the students by the subject and instead teaching the coding and decoding calculations with modular arithmetic, was taught using Euclidean division algorithm.