leo_cipher

I’ve been curious about this too. I based an algorithm on it, but in the end, I figured it wasn’t a guaranteed fix, so I let it go. I tried to find the steps that would yield the correct checksum. But I found it only…

The tricky part is definitely the middle characters. Any tweak there messes with the checksum and the compression flag. You should try changing those 6 characters and see if they yield the right flag 01. It’ll help…