This research aims to investigate the implications of applying a teaching sequence using
cryptography and numerical factoring in the learning of 1st grade high school students.
Cryptography has several applications in today’s society, from the security of accessing a
social network to even the protection of banking data; In this sense, the research sought to
present students from the history of cryptography to the functioning of RSA cryptography
and the role of a hacker in this environment. We tried to make a didactic approach using
videos, text, certificates from social networks and a final challenge. The students became
"hackers of good", performing the factorization of compound numbers contained in the
keys of the challenge and decoding the message of each urn using a pre-coded table, to
arrive at the result.