Lemur XOR

I've hidden two cool images by XOR with the same secret key so you can't see them!

This challenge requires performing a visual XOR between the RGB bytes of the two images - not an XOR of all the data bytes of the files.

images are flag.png and lemur.png

Solution

This WriteUp Solution is password protected by the flag of the challenge.

Flag:

We have to just extract rgb values of both images and xor them.To extract rgb values we can use PIL library in python.

break.py

from PIL import Image

lemur = Image.open("lemur.png")
flag = Image.open("flag.png")

rgb_lemur = lemur.load()
rgb_flag = flag.load()

for i in range(lemur.width):
    for j in range(lemur.height):
        l = rgb_lemur[i,j]
        f = rgb_flag[i,j]
        
        rgb_flag[i,j] = (l[0]^f[0], l[1]^f[1], l[2]^f[2])

flag.save("Flag.png")

Flag after running the script is crypto{X0Rly_n0t!}