The demotivation of students in the last grade of high school, after carrying out the selection
evaluations for undergraduate courses, is experienced in many Brazilian schools. Due to this
fact, this dissertation sought to create a didactic sequence that would stimulate the student in
his learning. We are currently experiencing a technological evolution in our relations with the
world and, going on this way, there has been an increase in the search for security of data and
information exchanged on the Internet. This dissertation has as its theme RSA Cryptography
(Rivest-Shamir-Adleman) and the objective of investigating and working on the mathematical
elements, which are necessary in the development of RSA Cryptography algorithms, in order to
instigate the curiosity and interest of students in going deeper into Mathematics. Eight didactic
interventions were planned for the presentation of the theme and the development of algorithms
for encoding and decoding messages. The results of the analysis of the interventions pointed out
that the students were interested in the theme and in the development of the algorithms and were
able to successfully carry out the proposed activities (about encoding and decoding messages).
We conclude that this didactic sequence stimulated the students’ interest in Mathematics classes
and provided moments of mathematical studies that potentiated Teaching and Learning in the
classroom.
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