# Hackit 2016 Quals - 1magePr1son
### Stegano - 150 pts

EN: Implementing of the latest encryption system as always brought a set of problems for one of the known FSI services: they have lost the module which is responsible for decoding information. And some information has https://ctf.com.ua/data/attachments/planet_982680d78ab9718f5a335ec05ebc4ea2.png.zipeen already ciphered! Your task for today: to define a cryptoalgorithm and decode the message.
h4ck1t{str(flag).upper()}

In this challenge, we're given a picture which is a beautiful wallpaper


If we look carefully at this picture, and we zoom a bit, we can see little pixels that are differents


Theses pixels are placed every 25 pixels (24 "normal" pixels between each "abnormal" pixel)

So we try to create an image with only theses pixels. We got this tiny python code :

```python
'''
Pod for Team Fourchette Bombe
'''
from PIL import Image

im = Image.open( 'planet.png' )
newIm = Image.new('RGB',(100,66),"yellow");

pixels = newIm.load()
pixelsIm = im.load()

for i in range(0,100):
for j in range(0,66):
pixels[i,j] = pixelsIm[i*24,j*24]

newIm.show()
newIm.save('final.png');
```

And the image we receive gives us the flag :


Flag : h4ck1t{SPACE_IS_THE_KEY}

Original writeup (https://github.com/JulesDT/ctfWriteUps/tree/master/Hackit%20Quals%202016/1magePr1son-%20Misc%20-%20150%20pts).