Hi there @emperorhassy! Thank you for your kind words. You can start the series here:
I missed a link between the 3rd and 4th posts. For ease of navigation, you may access the entire series at https://lemony.cricket as well!
But I guess the encrypted picture looks blurred and doesn't look sharper at the edges compared to the original picture.
Hmm... not quite. Remember that the reason that we encrypt things is to make them completely invisible to others. Does the picture on the right look completely random? Or can you sorta tell what's in the picture? That should help you along. The full explanation will be in the retrospective on the next post!