This article is intended as an explanation of the math required to solve the following challenge: Non-Divisible Subset Problem The goal is to find, given a set of numbers, the size of the biggest possible subset, whose values, when summed in all possible pairs, will not be evenly divisible by a…

Este post documenta la resolución de un challenge de picoCTF. Se nos brinda un texto cifrado mediante un método asimétrico (RSA) y una clave pública. Para resolver el desafío, se debe desencriptar el texto cifrado. Antes de explicar la resolución voy a explicar las bases del funcionamiento de RSA. Tras…

While going through some Kaggle exercises on data analysis, I found out about the folium library. It is quite an interesting tool, allowing you to add layers to existing open-source maps and display them on HTML. I decided to create a map to show some data from my country. I…

I am slowly going into the world of CTF, “Capture the Flag”. I am not talking about the first person shooter multiplayer game type, but of a series of challenges online related to computer engineering and computer science, of very varied topics. picoCTF is a great site to start. It…

Los fractales son elementos interesantes, estudiados en diversas ciencias. Figuras que se autoreplican, siendo iguales sin importar desde cuan cerca o lejos las veamos. La gran mayoría tiene propiedades matemáticas importantes a tener en cuenta y son una herramienta útil para el estudio del mundo. Ahora bien, ¿Qué tienen que…