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# Extraterrestrial Communication

## Description

Aliens have recently landed on the moon and are attempting to communicate with us. Can you figure out what they are trying to tell us?

## Solution

This is a particular challenge. We'll receive a .mp3 file. By listening to the media, we'll understand that we are working with an encoded message. Fortunately, I immediately understood how to decode it. In fact, this was an image encoded using the mode of transmission Scottie S1. The technology, in general, is SSTV: Slow Scan Television: it's used by radio amateurs in order to transmit images.

![](img1.png)

#### **FLAG >>** dctf{wHat_ev3n_1s_SSTV}

Original writeup (https://github.com/K1nd4SUS/CTF-Writeups/tree/main/dCTF_2021/Extraterrestrial%20Communication).